Luna's Column
What is a capped via hole?
A capped via is when plating is added over the via hole so that the surface is fully metalized with a minimum copper / cap plating thickness of 5um...
What is the difference between adhesive and adhesiveless flex systems?
Builds that use adhesive systems rely on adhesive to bond the copper to the flex core. As such this adhesive layer along with full coverlay, penetr...
What is the difference between semi-flex and rigid flex?
Semi flex is effectively a ‘standard’ multilayer PCB, built using specific types of FR4 that has been depth to a specific tolerance so that the res...
What are the available structures for flex and rigid flex PCBs?
There are numerous, different structures available. The more common ones are defined below:
Single sided flex (IPC-60103 type 1) Coverlay (polyimid...
Are there different types of HDI features?
The graphic below shows the main structures – type I, type II and type III as defined in IPC-2226.
Type I. Defines a single microvia layer on eithe...
What do microvia hole, blind via hole and buried via hole mean?
Microvia hole
According to the new definition within IPC-T-50M a microvia is a blind structure with a maximum aspect ratio of 1:1, terminating on ...
What is a HDI PCB?
IPC-2226 defines HDI as a printed circuit board with a higher wiring density per unit area than conventional printed circuit boards (PCB). They hav...
Process flow of Rigid-Flex PCB 2
Case 2: Motorola 1+2F+1
PCB features: 1+HDI design
BGA Pitch: 0.5mm
Flex board thickness: 25um without IVH hole design, the whole
PCB thickness: 0...
Process flow of Rigid-Flex PCB 1
Case 1: Motorola 1+2F+1 Mobile Display & Side Keys
PCB features: 1+HDI pcb design, BGA Pitch: 0.5mmFlex board thickness: 25um with IVH hole de...
What Are The Design Tips For Rigid-Flex PCB?
There are many differences between the flex and rigid board in CAD design of rigid-flex PCB
1) Design requirements for flexible zone circuit:
1.1 ...
2 Common Structures Of Rigid-flex PCB
1. The rigid flex board is to glue one or more rigid layers on the flexible board. The circuit on the rigid and flexible layersare connected thr...
4 Main Applications Of Rigid-Flex PCB
1.Industrial application
strial application includes rigid-flex PCB used in industry, military, and medical. Most industrial parts require the cha...