Browse Prior Art Database

Bare Chip Burn-In Socket Press Unit

IP.com Disclosure Number: IPCOM000117427D
Original Publication Date: 1996-Feb-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Tsujikawa, R: AUTHOR [+2]

Abstract

Disclosed is a device for bare chip burn-in socket which can be used as a bare chip burn-in socket by adding only a press unit and a carrier to current burn-in socket widely used for plastic quad flat package modules.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Bare Chip Burn-In Socket Press Unit

      Disclosed is a device for bare chip burn-in socket which can be
used as a bare chip burn-in socket by adding only a press unit and a
carrier to current burn-in socket widely used for plastic quad flat
package modules.

      The press unit is consisted of metal processed goods and
silicone rubber as in Fig. 1.  The metal part is made from a plate
pressed.  It has folds 1 on two edges to hook to the upper frame of
the current burn-in socket, and two ribs 2 on the top to support the
plate not to bend.  The silicone rubber 3 is a simple cube attached
to the center of the metal plate as in Fig. 1.  The press force can
be controlled easily by changing the height of the silicone rubber.

      The carrier is a printed circuit board made by ceramic or
plastic.  It has finger area for contact to chip bump, fanout area,
and contact pads for connection to the socket pins.  By changing the
patten of this carrier, it can be used to various chip sizes if I/O
count permits.  See Fig. 2 for the carrier.

      A device is put between the press unit and the carrier as
in Fig. 3.  Thus, a bare chip is placed on the carrier aligned to the
fingers and pressed by the silicone rubber block attached to the
press unit.  Thus, a very cheap bare chip burn-in device is got, by
which current burn-in socket and burn-in board can be utilized only
by changing the carrier unit and press unit.