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Home > Products > FPC > Rigid-Flex PCBs > Custom 4 Layer Rigid-Flex Hearing Aid PCB | PI FPC for Hearing Aid OEM

Custom 4 Layer Rigid-Flex Hearing Aid PCB | PI FPC for Hearing Aid OEM

  • Place of origin: China
  • Material: FR-4,PI
  • Board thickness: 0.3mm-1.6mm
  • Offer:
  • Range of copper thickness: 0.5oz-2.0oz
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PCB Process

1. Layer count: 4 layers, rigid-flex hybrid structure

2.Base material: Polyimide (PI) for flexible section, FR4 for rigid section

3.Base copper thickness: 18μm /18μm for both rigid & flex area

4.Board thickness: 0.45~0.55mm, flex part ~0.18±0.03mm, stiffener ~0.23±0.03mm

5.Coverlay: Yellow coverlay, top & bottom side

6.Solder mask: Green solder mask on top and bottom

7.Silkscreen: White silkscreen, top & bottom

8.Surface finish: ENIG (Immersion Gold)

9.Via process: Plugged holes available, hole size 0.11×0.3mm

10.Minimum line width/spacing: 0.04mm / 0.04mm

11.Electrical test: Flying probe test required

12.Outline routing: CNC routing, tolerance ±0.1mm

13.Capability: Support blind & buried vias, coverlay thickness 27~50μm, adhesive 12~25μm

14.Panel: 6 pcs per panel

15.Other: Extra copper on panel for PCB reinforcement, V-Cut not required


PCB Application Scenarios

This rigid-flex FPC is designed for hearing aid devices. 

It fits into tiny, curved housing of in-ear hearing aids, receiver-in-canal hearing aids, 

Bluetooth hearing aids and audiology accessories.

The flexible segment can bend freely inside ear shells, while rigid zones carry microphones,

DSP chips and power management components. 

Stable signal transmission, anti-fatigue bending 

and medical-grade reliability meet the long-term use requirement of hearing aid products.


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PCB Production Line

Our PCB workshop carries out rigid-flex board fabrication including PI lamination, 

coverlay bonding, drilling, plating, ENIG surface finishing, routing and flying probe testing.

 Carbon fiber stiffener (carbon plate) is precisely laminated onto designated FPC reinforcement 

area under controlled temperature and pressure, to enhance local rigidity for component 

soldering while keeping other sections flexible. 

Every hearing aid PCB is strictly inspected before shipment.


Contact Us

Contact us for any help regarding Hearing aids Multilayer rigid flex pcb：

Website: www.xdpcba.com

Email: sales10@xdpcba.com sales@xdpcba.com

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Xing Da Electric Technology Co., Ltd