Introduction To Flex PCB And Rigid Flex PCB Layer Stackup Types

- Jan 07, 2020-

Introduction to Flex PCB and Rigid Flex PCB Layer Stackup Types

Flex PCB and Rigid Flex PCB Layer Stackup Types

There are a number of standard PCB stackups available for flex and Rigid Flex PCB circuits, referred to as Types. These are summarized below.

Type 2-- Double Layer Flex PCB

Double-sided flexible printed wiring containing two conductive layers with plated through holes, with or without stiffeners. -Plated through-holes provide connection between layers. -Components, stiffeners, pins and connectors can be used. -Access holes or exposed pads without covers can be on either or both sides; vias can be covered on both sides. -Suitable for static and dynamic flex applications. -Two conductive layers with an insulating layer between; outer layers can have covers or exposed pads.

Type 1-- Single Layer Flex PCB

Single-sided flexible wiring containing one conductive layer and one or two polyimide outer cover layers. -Access holes to conductors can be on either one or both sides. -Components, stiffeners, pins and connectors can be used. -No plating in component holes. -Suitable for static and dynamic flex applications. -One conductive layer, either laminated between two insulating layers or uncovered on one side.

Type 3-- Multilayer Flex PCB

Multilayer flexible PCB containing three or more conductive layers with plated-through holes, with or without stiffeners. -Access holes or exposed pads without covers can be on either or both sides. -Plated through-holes provide connection between layers. -Three or more flexible conductive layers with flexible insulating layers between each one; outer layers can have covers or exposed pads. -Components, stiffeners, pins and connectors can be used. -Vias can be blind or buried. -Typically used for static flex PCB applications.

Type 4-- Multilayer Rigid Flex PCB

Multilayer rigid and flexible material combinations (Rigid Flex PCB) containing three or more conductive layers with plated-through holes. Rigid Flex PCB has conductors on the rigid layers, which differentiates it from multilayer circuits with stiffeners.

Type 4-- Multilayer Rigid Flex PCB

Multilayer rigid and flexible PCB material combinations (Rigid Flex PCB) containing three or more conductive layers with plated-through holes. Rigid Flex PCB has conductors on the rigid layers, which differentiates it from multilayer circuits with stiffeners. -Two or more conductive layers with either rigid or flexible insulation material as insulators between each one; outer layers can have covers or exposed pads. -Access holes or exposed pads without covers can be on either or both sides. -Plated through-holes extend through both rigid and flexible layers (apart from blind and buried vias). -Interconnects or vias can be fully covered for maximum insulation. -Stiffeners, connectors, Components, pins, heat sinks, and mounting brackets can be used.