Browse Prior Art Database

Self-Programming Multi-Orifice Fluorocarbon Impingement Cooling

IP.com Disclosure Number: IPCOM000102270D
Original Publication Date: 1990-Aug-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 3 page(s) / 80K

Publishing Venue

IBM

Related People

Carbone, MC: AUTHOR [+2]

Abstract

Disclosed is a device which permits multi-orifice fluorocarbon impingement (MFI) cooling to all chips on a module under test, which must be repositioned for each test site, at all times.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 77% of the total text.

Self-Programming Multi-Orifice Fluorocarbon Impingement Cooling

       Disclosed is a device which permits multi-orifice
fluorocarbon impingement (MFI) cooling to all chips on a module under
test, which must be repositioned for each test site, at all times.

      As a module increases in size, number of IC (integrated
circuit) chips and power, the cooling of these devices during test is
very critical.  Since most modules are tested via a probe, the device
must be repositioned with respect to the probe for every site to be
tested.  Depending on the size of the module and the number of IC
chips to be tested, this test matrix can become very large, i.e., a
module with 100 IC chips would require a 19 x 19 matrix for a total
of 361 potential test positions.  This matrix translates to a
required flow rate of 23 gal/min for a non-programmable MFI cooling
system.

      This device simply and automatically selects flow only where an
IC chip is present under a site of the 19 x 19 cooling matrix.  This
is accomplished by using a small plunger 1 (as shown in Fig. 1) to
cover the four holes 6 used for MFI cooling; when no IC chip is
present, a spring 3 seals the plunger with the seal 5 against the
plate and prevents any flow; when a test site is present, the post 4
is depressed and flow is permitted through the four holes. With this
device, the required flow rate is reduced to 6 gal/min, which makes
the total system less complicated and easily manageable.

      F...