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Stech PCBA

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Probe Card

The multilayer PCB at the heart of a wafer probe card -- it routes signals between the tester and the probe head that contacts each die on the wafer.

Circular probe card PCB with a central stiffener, illustrative
Probe Card, illustrative

Overview

The multilayer PCB at the heart of a wafer probe card -- it routes signals between the tester and the probe head that contacts each die on the wafer.

Why it matters

A probe card concentrates a very large number of signals into the small area around the probe head. That takes high layer counts, fine line and space, and low-loss materials, with flatness and plating quality held tightly across the board.

Typical Applications

  • Wafer sort and wafer-level test
  • Semiconductor device characterization
  • High-speed and RF device test
  • Memory and logic wafer test

Manufacturing Considerations

  • Dense signal fan-out around the probe head drives layer count and line / space
  • Low-loss laminates such as Megtron keep high-speed test signals clean
  • Flatness and gold contact areas matter where the board meets the probe head and the tester

Technical Characteristics

Max layer count
52 layers
Min trace / space
2.5 / 2.5 mil
Min hole size
0.1 mm
Standard materials
PolyimideM6GMegtronIsola
Surface finish options
ENIGENEPIGSelective Hard Gold / Soft Gold
Typical turnaround
15+ working days, quoted per design

Exact specifications are confirmed per order -- send a spec through Request a Quote for a firm answer. Company-wide process limits are published on the Manufacturing Capabilities page.

Ready to spec a Probe Card?

Board type, quantity, layers, material -- engineering reviews the full picture.