Custom Epoxy Vacuum Feedthroughs - A Great Alternative

custom epoxy feedthrough
Epoxy feedthrough on circuit board
Custom epoxy feedthroughs offer some excellent advantages when compared to ceramic and metal seals and should be considered whenever the need for a high integrity feedthrough is required. Below is a rundown of the advantages and specification for epoxy vacuum feedthroughs:

Advantages of Epoxy Feedthroughs:
  • Use on Integrated PCB - PCB (printed circuit board) mounted vacuum feedthroughs offer cost savings through part count reduction vs. standard feedthroughs, including integrated PCB.
  • Fewer Components and Increased Reliability - There are fewer components and connectors, typically reducing five components to one. Epoxy feedthroughs also eliminate additional  potential failure points.
  • Fast Prototyping for Custom Designs - Custom epoxy feedthroughs can provide custom prototypes quickly, without compromising high vacuum performance. 
  • Certified Low Outgassing. Epoxy feedthroughs can meet NASA outgassing requirements with 100% assurance. <1.0% Total Mass Loss (TML). Meets the NASA ASTM E595 spec.
  • Clear epoxy feedthroughs - Allow for the visual inspection of your components.
  • Board mountable - High vacuum performance.
  • Competitive pricing - Compared to ceramic and metal seals.
Common Uses and Applications:
  • Catheter Materials
  • Circuit / Electronic Assembly
  • Endoscopes, Fiber Optic
  • LCD’s, Medical Epoxies
  • Non-Conductive, Optical Materials
  • Opto-Packaging, PCB Level Materials
  • Potting, Solar, Underfill, 
  • USP Class VI Approved


Vacuum Integrity
  • Vacuum to 10^-8Torr
Voltage Allowance
  • 400-600 volt per mil
  • Up to 200°C continuous & 300°C intermittent.
Strength and Hardness
  • Defined by the maximum force that can be applied to two bonded plates, is 2,000 Psi.
If you're interested in learning more about custom epoxy feedthroughs, please contact Belilove Engineers at  (510) 274-1990.