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Browse Prior Art Database

IBM Blue Silicone Semiconductor Encapsulant

IP.com Disclosure Number: IPCOM000108665D
Original Publication Date: 1992-Jun-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 1 page(s) / 26K

Publishing Venue

IBM

Related People

Poole, JD: AUTHOR

Abstract

Disclosed is a blue-colored silicone TAB encapsulant. The formulation consists of 0.5 weight percent titanium dioxide, 1.0 weight percent cobalt aluminate and 98.5 weight percent silicone semiconductor encapsulant. This mixture results in an IBM blue color and has been qualified for use on all aluminum bump TAB packages in IBM. This new silicone based encapsulant is blended specifically to IBM's criteria.

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IBM Blue Silicone Semiconductor Encapsulant

       Disclosed is a blue-colored silicone TAB encapsulant. The
formulation consists of 0.5 weight percent titanium dioxide, 1.0
weight percent cobalt aluminate and 98.5 weight percent silicone
semiconductor encapsulant.  This mixture results in an IBM blue color
and has been qualified for use on all aluminum bump TAB packages in
IBM.  This new silicone based encapsulant is blended specifically to
IBM's criteria.

      It offers the following properties:
      Ease of inspectability due to its high color contrast to the
rest of the TAB module.  This color was arrived at by design.
      The material attenuates light known to cause soft fails on
integrated circuits.  The unique blend of titanium dioxide and cobalt
aluminate were selected specifically for their light-absorbing
properties, with the resultant absorption covering the entire
UV/visible spectra.
      With or without dispersants this mixture will not cause
electrical leakage.