Browse Prior Art Database

E-Beam Personalization for Quick Turn Around Ceramic Substrate Build

IP.com Disclosure Number: IPCOM000113891D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 52K

Publishing Venue

IBM

Related People

Safaraz, MA: AUTHOR [+4]

Abstract

Developed is an approach to fully utilize the e-beam personalization tool for quick turn around build of complete ceramic substrates to provide the competitive edge of significantly reduced cycle time for product development. In the maskless e-beam personalization process, a disposable mylar sheet is laminated and patterned simultaneously with the green sheet. The mylar sheet acts as the mask for the subsequent thick film metalization (screening), and then removed, thus completing the green sheet personalization process without the fabrication of separate metal screening masks. It is a quick turn around process because it is data drive, and the need for fabricating separate metal (screening) masks is eliminated for the layers that can use this disposable mask e-beam process.

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E-Beam Personalization for Quick Turn Around Ceramic Substrate Build

      Developed is an approach to fully utilize the e-beam
personalization tool for quick turn around build of complete ceramic
substrates to provide the competitive edge of significantly reduced
cycle time for product development.  In the maskless e-beam
personalization process, a disposable mylar sheet is laminated and
patterned simultaneously with the green sheet.  The mylar sheet acts
as the mask for the subsequent thick film metalization (screening),
and then removed, thus completing the green sheet personalization
process without the fabrication of separate metal screening masks.
It is a quick turn around process because it is data drive, and the
need for fabricating separate metal (screening) masks is eliminated
for the layers that can use this disposable mask e-beam process.
Ideally it can significantly reduce the product build cycle time from
design to complete hardware build.  However, there is a serious
drawback in the existing disposable mylar sheet personalization
process, that is: it cannot be used for layers that have "islands"
(such as the mesh layers) because the mylar sheet cannot be removed
after screening.  This puts serious limitation to the e-beam
personalization for quick turn around build of the complete ceramic
substrates.

      The problem can be solved by dividing the mesh layer pattern
into 2 sub-patterns, SUBMESH 1 and SUBMESH 2, where SUBMESH 1
contains all X-line...