Automated PCB test method terminology: What is the common name for an automated fixture that uses an array of spring-loaded probes to contact many test points on a printed circuit board simultaneously?

Introduction / Context:
Manufacturing test is crucial for quality and yield. One widely used method for checking continuity, component presence, in-circuit parameters, and sometimes boundary-scan access on assembled PCBs is a mechanical fixture that contacts many nodes at once.

Given Data / Assumptions:

• The fixture employs numerous spring pins (pogo pins) aligned with test pads or vias.
• The tester can rapidly sequence measurements and program devices through these contact points.
• Terminology distinguishes this hardware from logic design terms like LUT, CLB, or CPLD.

Concept / Approach:
The descriptive name “bed-of-nails” comes from the dense field of probes resembling nails. It enables automated, repeatable, high-throughput testing. This is distinct from design-time structures (LUTs and CLBs in FPGAs) or device classes (CPLD).

Step-by-Step Solution:

Verification / Alternative check:
Electronics manufacturing references and EMS vendors universally use “bed-of-nails” to describe such test fixtures.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing manufacturing test terminology with digital logic design terms; assuming boundary-scan eliminates the need for physical access—many boards still rely on fixtures.

Final Answer:
bed-of-nails