Browse Prior Art Database

Protective Overcoat/Insulation of Tape Automated Bonding (TAB) Products

IP.com Disclosure Number: IPCOM000121168D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 1 page(s) / 31K

Publishing Venue

IBM

Related People

Pierce, CR: AUTHOR

Abstract

Disclosed is a method for the application of a protective overcoat insulation material to a flat thin film product. This method is clean, fast and inexpensive where precise location is needed.

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This is the abbreviated version, containing approximately 100% of the total text.

Protective Overcoat/Insulation of Tape Automated Bonding (TAB) Products

      Disclosed is a method for the application of a protective
overcoat insulation material to a flat thin film product. This method
is clean, fast and inexpensive where precise location is needed.

      The method is basically an offset printing technique. Instead
of using the typeset to transfer to the part, a transfer roller run
on a timing chain picks up the overcoat material from a type plate
that is machined to the exact image that is to be covered on the
part, and transfers it to the part.

      The part is indexed into place and the offset roller passes
over the part transferring the overcoat material to the part.  The
index time and overcoat time is very short. If a thicker overcoat is
needed more passes of the roller will deposit more material.  Being
that the part is located in one position and the roller is on a
timing chain, repeated passes will maintain the close tolerances
needed.

      The overcoat material is in an ink or paste form; therefore,
only the amount of material picked up off the plate is used and no
over run or mist has to be removed.

      Disclosed anonymously.