Definition
A wafer prober loads, aligns, thermally conditions, and positions a wafer so that a probe card can contact designated pads or bumps while an automatic test system applies patterns and measurements to each die or test structure.
Process position
Inputs
- Fabricated wafer
- Probe card
- Wafer map
- Test and temperature recipe
Outputs
- Tested wafer
- Die-level bin map
- Contact and prober telemetry
How it works
- 01Load and identify wafer
- 02Align wafer and probe card
- 03Establish contact and temperature
- 04Step through die test sites
- 05Generate map and unload
Role in the production flow
The prober is the mechanical, thermal, and positional interface between a full wafer and electrical test. Contact quality can create false failures or damage, so prober, probe card, device pads, and tester must be qualified as one cell.
A precision handling and contact system that positions wafer die under a probe interface for electrical test before singulation.
Boundary: The cited manufacturers document the equipment category and its intended uses; this record does not independently validate vendor performance claims or rank products.
Qualification and production boundaries
Equipment fit depends on wafer size and thickness, pad or bump geometry, contact technology, temperature range, parallelism, probe force, test-site count, index time, handling risk, and tester integration.
Equipment fit depends on wafer size and thickness, pad or bump geometry, contact technology, temperature range, parallelism, probe force, test-site count, index time, handling risk, and tester integration.
Boundary: Actual acceptance limits, recipes, throughput, availability, and ownership economics are product-, process-, site-, and contract-specific.
Sources
Citations support the tagged claims above. Access dates record when Maha Strategies last checked the public source.
- [1]Semiconductor Production Equipment · Tokyo Electron · accessed 2026-08-13
- [2]Technical Briefing: Semiconductor Test · Advantest · 2024 · accessed 2026-08-13