Peter Ross Read

US Patent:

53644727, Nov 15, 1994

Filed:

Jul 21, 1993

Appl. No.:

8/095646

Inventors:

Garrett J. Heyns - Boulder CO
Terry R. McClure - Kersey CO
Hugh Nicholl - Berthoud CO
Peter H. Read - Morrisville PA
Steven M. Schulte - Westminster CO
Mohammad F. Tabrizi - Westminster CO

Assignee:

AT&T Bell Laboratories - Murray Hill NJ

International Classification:

B08B 700
B24C 100
B24C 322
B24C 332

US Classification:

134 7

Abstract:

A system for cleaning test probes attached to a probe mat fixture by propelling CO. sub. 2 pellets at the test probes, by rotating the fixture so that the pellets impact different sides of the test probes, and by providing electrostatic protection for active devices mounted on the probemat fixture. The CO. sub. 2 pellets are propelled so that they strike the test probes at an angle to the horizontal plane of the test probe as mounted on the probemat fixture. Electrostatic protection is provided by connecting all electrical connections to the probemat fixture to ground and by reducing electrostatic charge build up on the probemat fixture by using an ionizer to direct ions at the probemat fixture.