Japan Electronic Materials (JEM)
A Hyogo-based probe card maker supplying cantilever, vertical and MEMS probe cards that connect wafer probers and testers to logic, memory and power devices.
日本電子材料・Test and reliability equipment・Last updated: October 27, 2026
Overview
Japan Electronic Materials is headquartered in Amagasaki, Hyogo and specializes in probe cards. A probe card carries the needles that touch each chip's pads during wafer test.
It makes cantilever, vertical and MEMS probe cards and designs them for each device, following the trend to more pins at finer pitches.
Business: Probe cards for wafer test
Why it matters
- A probe card is custom-made for each chip design and wears out with use, so it behaves like a consumable.
- Memory makers test many dies at once, which needs large probe cards with thousands of contacts.
Main products
- •Vertical probe cards
- •Cantilever probe cards
- •MEMS probe cards
Equipment categories
Categories where Japan Electronic Materials (JEM) is listed, with other Japanese makers and their products:
Sites in Japan
Head officeHeadquarters
Amagasaki, Hyogo