Browse Prior Art Database

Tester Bed to Verify the Technology Capability of a Module and Printed Circuit Board Assembly

IP.com Disclosure Number: IPCOM000036071D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Gorman, RE: AUTHOR [+3]

Abstract

This article describes a tester system to automatically test and evaluate the capability of a module and printed circuit (PC) board assembly.

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Tester Bed to Verify the Technology Capability of a Module and Printed Circuit Board Assembly

This article describes a tester system to automatically test and evaluate the capability of a module and printed circuit (PC) board assembly.

Referring to the drawing, the tester system consists of three main units: the cooling and vapor recovery unit, the cooling bath unit and the control console. The primary function of this system is to measure and record the following: 1. Voltage fluctuations during simultaneous driver

switching

2. Signal pulse distortion

3. Noise coupling from adjacent signal lines

This data is then evaluated to verify the technology capability of both the module and PC board assembly.

The cooling bath unit consists of a 150-gallon tank with front and rear doors which are sealed in the closed position. The module and PC board assembly (not shown) are mounted vertically to the inside rear door of the tank for easy removal and replacement. Two independent probe arms that are accurate and repeatable to plus or minus .0005" are hanging vertically down into the cooling bath. On the end of the probe arms are yaw assemblies.

Coolant from the main reservoir in the cooling and vapor recovery unit is pumped into the cooling bath to provide forced convection cooling of the chips that are mounted to the surface of the modules after power is supplied to the module and PC board assembly. The cooling system is capable of cooling 500 chips at 25 watts per chip for...