{"id":5924,"date":"2026-07-14T08:27:00","date_gmt":"2026-07-14T00:27:00","guid":{"rendered":"https:\/\/www.topfastpcb.com\/?p=5924"},"modified":"2026-06-25T15:27:53","modified_gmt":"2026-06-25T07:27:53","slug":"pcb-core-and-prepreg","status":"publish","type":"post","link":"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/","title":{"rendered":"Materiales para el n\u00facleo y prepreg de placas de circuito impreso"},"content":{"rendered":"<p>Todas las placas de circuito impreso multicapa se fabrican a partir de dos materiales fundamentales: el n\u00facleo y el preimpregnado. Aunque rara vez son visibles en el producto acabado, desempe\u00f1an un papel fundamental a la hora de determinar el grosor de la placa, la separaci\u00f3n entre capas, el control de la impedancia, la estabilidad mec\u00e1nica y la fiabilidad de la fabricaci\u00f3n.<\/p><p>Tanto si se trata de fabricar una placa sencilla de cuatro capas como una placa base compleja con un elevado n\u00famero de capas, comprender c\u00f3mo interact\u00faan los materiales del n\u00facleo y los preimpregnados es fundamental para el dise\u00f1o del apilamiento y la fabricaci\u00f3n de placas de circuito impreso.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials.jpg\" alt=\"Materiales para el n\u00facleo y prepreg de placas de circuito impreso\" class=\"wp-image-5925\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_74 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Tabla de contenidos<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#What_Is_PCB_Core_Material\" >\u00bfQu\u00e9 es el material del n\u00facleo de una placa de circuito impreso?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Functions_of_Core_Material\" >Funciones del material del n\u00facleo<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#What_Is_PCB_Prepreg\" >\u00bfQu\u00e9 es el prepreg para placas de circuito impreso?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#How_Core_and_Prepreg_Work_Together\" >C\u00f3mo funcionan conjuntamente el n\u00facleo y el prepreg<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Common_Core_Materials\" >Materiales de los Est\u00e1ndares Comunes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Standard_FR4_Core\" >N\u00facleo FR4 est\u00e1ndar<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#High_TG_Core_Materials\" >Materiales para n\u00facleos con alto contenido en TG<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#High-Speed_Core_Materials\" >Materiales para n\u00facleos de alta velocidad<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Common_Prepreg_Types\" >Tipos habituales de preimpregnados<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Low_Resin_Prepreg\" >Preimpregnado con bajo contenido en resina<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#High_Resin_Prepreg\" >Preimpregnado con alto contenido en resina<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Core_and_Prepreg_in_Impedance_Control\" >N\u00facleos y prepregs en el control de la impedancia<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Material_Selection_for_Multilayer_PCBs\" >Selecci\u00f3n de materiales para placas de circuito impreso multicapa<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Electrical_Performance\" >Rendimiento el\u00e9ctrico<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Thermal_Requirements\" >Requisitos t\u00e9rmicos<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Board_Thickness\" >Espesor del tablero<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Manufacturing_Capability\" >Capacidad de fabricaci\u00f3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Cost_Considerations\" >Consideraciones econ\u00f3micas<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Common_Challenges_During_Lamination\" >Problemas habituales durante el laminado<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Resin_Starvation\" >Falta de resina<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Excessive_Resin_Flow\" >Flujo excesivo de resina<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Delamination\" >Delaminaci\u00f3n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Thickness_Variation\" >Variaci\u00f3n del espesor<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#Why_Material_Compatibility_Matters\" >Por qu\u00e9 es importante la compatibilidad de los materiales<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-core-and-prepreg\/#FAQ\" >Preguntas m\u00e1s frecuentes<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_PCB_Core_Material\"><\/span>\u00bfQu\u00e9 es el material del n\u00facleo de una placa de circuito impreso?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>El material del n\u00facleo es un laminado totalmente curado con una l\u00e1mina de cobre adherida a ambas caras.<\/p><p>Sirve como base estructural de una placa de circuito impreso multicapa y aporta rigidez durante su fabricaci\u00f3n.<\/p><p>Un n\u00facleo t\u00edpico se compone de:<\/p><ul class=\"wp-block-list\"><li>Refuerzo de fibra de vidrio<\/li>\n\n<li>Sistema de resina<\/li>\n\n<li>L\u00e1mina de cobre en ambas superficies<\/li><\/ul><p>La estructura es similar a la de los materiales laminados est\u00e1ndar que se describen en <strong><a href=\"https:\/\/www.topfastpcb.com\/es\/blog\/pcb-laminate-materials\/\">Explicaci\u00f3n de los materiales laminados para placas de circuito impreso<\/a><\/strong>, salvo que la resina ya ha completado el proceso de curado.<\/p><p>Los materiales del n\u00facleo est\u00e1n disponibles en una amplia gama de espesores para adaptarse a los distintos requisitos de apilado.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Functions_of_Core_Material\"><\/span>Funciones del material del n\u00facleo<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Las capas centrales proporcionan:<\/p><ul class=\"wp-block-list\"><li>Resistencia mec\u00e1nica<\/li>\n\n<li>Aislamiento el\u00e9ctrico<\/li>\n\n<li>Soporte de cobre<\/li>\n\n<li>Estabilidad dimensional<\/li><\/ul><p>Sin n\u00facleos, las placas multicapa no mantendr\u00edan su integridad estructural durante el laminado y el montaje.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Is_PCB_Prepreg\"><\/span>\u00bfQu\u00e9 es el prepreg para placas de circuito impreso?<span class=\"ez-toc-section-end\"><\/span><\/h2><p>\u00abPrepreg\u00bb es la abreviatura de \u00abmaterial preimpregnado\u00bb.<\/p><p>Est\u00e1 compuesto por tela de fibra de vidrio impregnada con resina parcialmente curada.<\/p><p>A diferencia del material del n\u00facleo, el preimpregnado permanece en un estado semicurado antes de la laminaci\u00f3n.<\/p><p>Durante el proceso de laminaci\u00f3n de los circuitos impresos, el calor y la presi\u00f3n hacen que la resina fluya y se endurezca por completo, uniendo entre s\u00ed las capas adyacentes.<\/p><p>Una capa de prepreg suele contener:<\/p><ul class=\"wp-block-list\"><li>Tela de fibra de vidrio<\/li>\n\n<li>Resina epoxi parcialmente curada<\/li>\n\n<li>Sin l\u00e1mina de cobre<\/li><\/ul><p>Su objetivo principal es crear adhesi\u00f3n entre las capas del n\u00facleo.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Core_and_Prepreg_Work_Together\"><\/span>C\u00f3mo funcionan conjuntamente el n\u00facleo y el prepreg<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Una placa de circuito impreso multicapa es, en esencia, una pila de capas de cobre separadas por n\u00facleos y prepregs.<\/p><p>Por ejemplo, una estructura t\u00edpica de cuatro capas podr\u00eda tener el siguiente aspecto:<\/p><pre class=\"wp-block-code\"><code>Cobre\nN\u00facleo\nCobre\nPreimpregnado\nCobre\nN\u00facleo\nCobre<\/code><\/pre><p>Durante el laminado:<\/p><ol start=\"1\" class=\"wp-block-list\"><li>El prepreg se ablanda.<\/li>\n\n<li>La resina se cuela por los huecos.<\/li>\n\n<li>Las capas est\u00e1n unidas entre s\u00ed.<\/li>\n\n<li>La resina se endurece por completo.<\/li>\n\n<li>Se forma una \u00fanica estructura r\u00edgida.<\/li><\/ol><p>Este proceso permite crear la estructura de placas de circuito impreso multicapa que se utiliza en la electr\u00f3nica moderna.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Core_Materials\"><\/span>Materiales de los Est\u00e1ndares Comunes<span class=\"ez-toc-section-end\"><\/span><\/h2><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Standard_FR4_Core\"><\/span>N\u00facleo FR4 est\u00e1ndar<span class=\"ez-toc-section-end\"><\/span><\/h3><p>La mayor\u00eda de las placas de circuito impreso multicapa utilizan materiales de n\u00facleo FR4.<\/p><p>Las ventajas incluyen:<\/p><ul class=\"wp-block-list\"><li>Bajo coste<\/li>\n\n<li>Buena resistencia mec\u00e1nica<\/li>\n\n<li>Caracter\u00edsticas de procesamiento estables<\/li>\n\n<li>Amplia disponibilidad<\/li><\/ul><p>En el \u00e1mbito de la electr\u00f3nica de uso general, el FR4 sigue siendo la opci\u00f3n m\u00e1s utilizada.<\/p><p>Los ingenieros que no est\u00e9n familiarizados con las propiedades del FR4 pueden consultar <strong><a href=\"https:\/\/www.topfastpcb.com\/es\/blog\/fr4-pcb-material\/\">Explicaci\u00f3n del material FR4 para placas de circuito impreso<\/a><\/strong> para obtener m\u00e1s informaci\u00f3n.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_TG_Core_Materials\"><\/span>Materiales para n\u00facleos con alto contenido en TG<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Las aplicaciones en las que se alcanzan temperaturas m\u00e1s elevadas suelen utilizar n\u00facleos con un TG elevado.<\/p><p>Los beneficios incluyen:<\/p><ul class=\"wp-block-list\"><li>Mayor estabilidad t\u00e9rmica<\/li>\n\n<li>Reducci\u00f3n de la expansi\u00f3n en el eje Z<\/li>\n\n<li>Mayor fiabilidad durante el montaje sin plomo<\/li><\/ul><p>Estos materiales suelen encontrarse en:<\/p><ul class=\"wp-block-list\"><li>Electr\u00f3nica del autom\u00f3vil<\/li>\n\n<li>Controles industriales<\/li>\n\n<li>Sistemas de conversi\u00f3n de energ\u00eda<\/li>\n\n<li>Servidores<\/li><\/ul><p>Tal y como se ha comentado en <strong><a href=\"https:\/\/www.topfastpcb.com\/es\/blog\/high-tg-fr4-pcb\/\">PCB de FR4 con alto valor de TG<\/a><\/strong>, unos valores m\u00e1s altos de TG pueden mejorar significativamente la fiabilidad a largo plazo.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High-Speed_Core_Materials\"><\/span>Materiales para n\u00facleos de alta velocidad<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Los equipos de comunicaci\u00f3n modernos suelen utilizar n\u00facleos especializados de baja p\u00e9rdida.<\/p><p>Algunos ejemplos son:<\/p><ul class=\"wp-block-list\"><li>Serie Megtron<\/li>\n\n<li>Materiales de alta velocidad Isola<\/li>\n\n<li>Laminados I-Speed<\/li>\n\n<li>Sistemas FR4 de baja p\u00e9rdida<\/li><\/ul><p>Estos materiales ayudan a mantener la integridad de la se\u00f1al a altas velocidades de transmisi\u00f3n de datos.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-1.jpg\" alt=\"Materiales para el n\u00facleo y prepreg de placas de circuito impreso\" class=\"wp-image-5926\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-1.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-1-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Prepreg_Types\"><\/span>Tipos habituales de preimpregnados<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Los prepregs se clasifican generalmente seg\u00fan el tipo de fibra de vidrio y el contenido de resina.<\/p><p>Entre los estilos m\u00e1s habituales de fibra de vidrio se encuentran:<\/p><ul class=\"wp-block-list\"><li>106<\/li>\n\n<li>1080<\/li>\n\n<li>2113<\/li>\n\n<li>2116<\/li>\n\n<li>7628<\/li><\/ul><p>Cada modelo presenta un grosor y unas caracter\u00edsticas de la resina diferentes.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Low_Resin_Prepreg\"><\/span>Preimpregnado con bajo contenido en resina<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Ofertas:<\/p><ul class=\"wp-block-list\"><li>Mejor control del espesor<\/li>\n\n<li>Flujo de resina reducido<\/li>\n\n<li>Mayor estabilidad dimensional<\/li><\/ul><p>Se utiliza a menudo en placas de circuito impreso con un gran n\u00famero de capas.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"High_Resin_Prepreg\"><\/span>Preimpregnado con alto contenido en resina<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Establece lo siguiente:<\/p><ul class=\"wp-block-list\"><li>Mayor capacidad de llenado<\/li>\n\n<li>Mejora de la adhesi\u00f3n<\/li>\n\n<li>Espaciado diel\u00e9ctrico mejorado<\/li><\/ul><p>Se suele utilizar cuando hay elementos de cobre de mayor tama\u00f1o.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Core_and_Prepreg_in_Impedance_Control\"><\/span>N\u00facleos y prepregs en el control de la impedancia<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Una de las funciones m\u00e1s importantes de los materiales de n\u00facleo y preimpregnados es la gesti\u00f3n de la impedancia.<\/p><p>La impedancia de la se\u00f1al depende de:<\/p><ul class=\"wp-block-list\"><li>Constante diel\u00e9ctrica (Dk)<\/li>\n\n<li>Distancia entre capas<\/li>\n\n<li>Espesor del cobre<\/li>\n\n<li>Geometr\u00eda de traza<\/li><\/ul><p>El grosor del n\u00facleo o del prepreg influye directamente en la distancia entre las capas de se\u00f1al y los planos de referencia.<\/p><p>Incluso los cambios m\u00e1s peque\u00f1os pueden influir de manera significativa en los valores de impedancia controlada.<\/p><p>Por este motivo, el dise\u00f1o de la pila y la selecci\u00f3n de materiales deben coordinarse desde el inicio del proyecto.<\/p><p>Los futuros an\u00e1lisis sobre las propiedades diel\u00e9ctricas se tratar\u00e1n en <strong>Valores de Dk y Df en materiales de PCB<\/strong>.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Material_Selection_for_Multilayer_PCBs\"><\/span>Selecci\u00f3n de materiales para placas de circuito impreso multicapa<span class=\"ez-toc-section-end\"><\/span><\/h2><p>A la hora de seleccionar los materiales para el n\u00facleo y los prepreg, hay que tener en cuenta varios factores.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Electrical_Performance\"><\/span>Rendimiento el\u00e9ctrico<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Las aplicaciones que implican se\u00f1ales de alta velocidad requieren propiedades diel\u00e9ctricas estables.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thermal_Requirements\"><\/span>Requisitos t\u00e9rmicos<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Las temperaturas de funcionamiento m\u00e1s elevadas pueden requerir sistemas con un TG elevado.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Board_Thickness\"><\/span>Espesor del tablero<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Las combinaciones de n\u00facleo y prepreg determinan el grosor final de la placa de circuito impreso.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Manufacturing_Capability\"><\/span>Capacidad de fabricaci\u00f3n<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Algunos materiales requieren perfiles de laminaci\u00f3n especializados y controles de procesamiento espec\u00edficos.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cost_Considerations\"><\/span>Consideraciones econ\u00f3micas<span class=\"ez-toc-section-end\"><\/span><\/h3><p>La selecci\u00f3n de materiales debe ajustarse a los requisitos de rendimiento, en lugar de optar por las especificaciones m\u00e1s exigentes disponibles.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Challenges_During_Lamination\"><\/span>Problemas habituales durante el laminado<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Una selecci\u00f3n inadecuada de los materiales puede dar lugar a diversos problemas de fabricaci\u00f3n.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Resin_Starvation\"><\/span>Falta de resina<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Un flujo insuficiente de resina puede provocar huecos o una adhesi\u00f3n deficiente.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Excessive_Resin_Flow\"><\/span>Flujo excesivo de resina<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Un movimiento excesivo de la resina puede alterar la distancia diel\u00e9ctrica y afectar a la impedancia.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Delamination\"><\/span>Delaminaci\u00f3n<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Una compatibilidad deficiente entre los materiales puede provocar la separaci\u00f3n de las capas durante los ciclos t\u00e9rmicos.<\/p><h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Thickness_Variation\"><\/span>Variaci\u00f3n del espesor<span class=\"ez-toc-section-end\"><\/span><\/h3><p>Una selecci\u00f3n incorrecta del prepreg puede dar lugar a un espesor irregular de la placa acabada.<\/p><p>Los fabricantes de placas de circuito impreso con experiencia eval\u00faan estos factores durante el desarrollo de la estructura de la placa para minimizar los riesgos de producci\u00f3n.<\/p><div class=\"wp-block-image\"><figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"402\" src=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-2.jpg\" alt=\"Materiales para el n\u00facleo y prepreg de placas de circuito impreso\" class=\"wp-image-5927\" srcset=\"https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-2.jpg 600w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-2-300x201.jpg 300w, https:\/\/www.topfastpcb.com\/wp-content\/uploads\/2026\/06\/PCB-Core-and-Prepreg-Materials-2-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><\/div><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_Material_Compatibility_Matters\"><\/span>Por qu\u00e9 es importante la compatibilidad de los materiales<span class=\"ez-toc-section-end\"><\/span><\/h2><p>Los materiales del n\u00facleo y los prepreg suelen proceder del mismo fabricante de laminados.<\/p><p>La combinaci\u00f3n adecuada de los sistemas de materiales contribuye a garantizar:<\/p><ul class=\"wp-block-list\"><li>Expansi\u00f3n t\u00e9rmica uniforme<\/li>\n\n<li>Uni\u00f3n fiable<\/li>\n\n<li>Rendimiento diel\u00e9ctrico estable<\/li>\n\n<li>Mejora del rendimiento de la producci\u00f3n<\/li><\/ul><p>El uso de materiales incompatibles puede plantear problemas de fiabilidad a lo largo de la vida \u00fatil del producto.<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>Preguntas m\u00e1s frecuentes<span class=\"ez-toc-section-end\"><\/span><\/h2><div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1782354527137\"><strong class=\"schema-faq-question\">P: \u00bfCu\u00e1l es la diferencia entre el n\u00facleo y el prepreg?<\/strong> <p class=\"schema-faq-answer\">R: El material del n\u00facleo est\u00e1 totalmente curado y contiene una l\u00e1mina de cobre por ambas caras. El prepreg est\u00e1 parcialmente curado y act\u00faa como capa de uni\u00f3n durante el laminado.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782354537620\"><strong class=\"schema-faq-question\">P: \u00bfInfluye el prepreg en la impedancia?<\/strong> <p class=\"schema-faq-answer\">R: S\u00ed. El grosor del prepreg y sus propiedades diel\u00e9ctricas influyen directamente en los valores de impedancia y en el rendimiento de la se\u00f1al.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782354549057\"><strong class=\"schema-faq-question\">P: \u00bfSe pueden utilizar diferentes prepregs en la misma placa de circuito impreso?<\/strong> <p class=\"schema-faq-answer\">R: S\u00ed. En muchas estructuras multicapa se utilizan distintos tipos de prepreg para cumplir con requisitos espec\u00edficos de espesor y propiedades el\u00e9ctricas.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782354561082\"><strong class=\"schema-faq-question\">P: \u00bfPor qu\u00e9 es importante el flujo de la resina en los prepregs?<\/strong> <p class=\"schema-faq-answer\">R: Un flujo adecuado de la resina garantiza una adhesi\u00f3n completa entre las capas y ayuda a evitar la formaci\u00f3n de huecos o la delaminaci\u00f3n.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1782354575228\"><strong class=\"schema-faq-question\">P: \u00bfTodas las placas de circuito impreso multicapa requieren prepreg?<\/strong> <p class=\"schema-faq-answer\">R: S\u00ed. El prepreg es esencial para unir las capas del n\u00facleo entre s\u00ed durante el proceso de laminaci\u00f3n.<\/p> <\/div> <\/div><p><\/p>","protected":false},"excerpt":{"rendered":"<p>Los materiales de n\u00facleo y los prepregs son los componentes b\u00e1sicos de las placas de circuito impreso multicapa. Los materiales de n\u00facleo proporcionan soporte estructural y aislamiento el\u00e9ctrico, mientras que los prepregs unen las capas entre s\u00ed durante el proceso de laminaci\u00f3n. Su espesor, sus propiedades diel\u00e9ctricas y las caracter\u00edsticas de la resina influyen directamente en el control de la impedancia, la fiabilidad de la placa, el rendimiento de la fabricaci\u00f3n y el rendimiento general de la placa de circuito impreso.<\/p>","protected":false},"author":1,"featured_media":5928,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[108],"tags":[486,484],"class_list":["post-5924","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-core","tag-pcb-material"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB Core and Prepreg Materials<\/title>\n<meta name=\"description\" content=\"PCB core and prepreg materials, their role in multilayer PCB construction, impedance control, lamination, and material selection for reliable PCB 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What is the difference between core and prepreg?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Core material is fully cured and contains copper foil on both sides. Prepreg is partially cured and acts as the bonding layer during lamination.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-core-and-prepreg\/#faq-question-1782354537620","position":2,"url":"https:\/\/www.topfastpcb.com\/blog\/pcb-core-and-prepreg\/#faq-question-1782354537620","name":"Q: Does prepreg affect impedance?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Yes. Prepreg thickness and dielectric properties directly influence impedance values and signal performance.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/www.topfastpcb.com\/blog\/pcb-core-and-prepreg\/#faq-question-1782354549057","position":3,"url":"https:\/\/www.topfastpcb.com\/blog\/pcb-core-and-prepreg\/#faq-question-1782354549057","name":"Q: Can different prepregs be used in the same PCB?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"A: Yes. 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