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Browse Prior Art Database

Thin Light Card/Stiffener Attach Process

IP.com Disclosure Number: IPCOM000115285D
Original Publication Date: 1995-Apr-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Bhatt, A: AUTHOR [+4]

Abstract

The following process steps are used to attach a Thin Light Card (TLC) to a copper stiffener using epoxy: 1. The stiffener is placed on a pinned fixture which is used for the final alignment of the TLC and stiffener and to establish control limits. 2. The epoxy is then applied to the TLC using a method known as flood coating. This involves using a semi-automatic screen table to apply the material. Image screening could also be used to apply the epoxy to the stiffener if warranted. 3. Once the epoxy is applied, the TLC is than placed on the same fixture as the stiffener. The pins in the fixture automatically align the two layers making misregistration impossible. The TLC is then pressed down on top of the stiffener. 4.

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This is the abbreviated version, containing approximately 90% of the total text.

Thin Light Card/Stiffener Attach Process

      The following process steps are used to attach a Thin Light
Card (TLC) to a copper stiffener using epoxy:
  1.  The stiffener is placed on a pinned fixture which is used for
the
       final alignment of the TLC and stiffener and to establish
control
       limits.
  2.  The epoxy is then applied to the TLC using a method known as
       flood coating.  This involves using a semi-automatic screen
table
       to apply the material.  Image screening could also be used to
       apply the epoxy to the stiffener if warranted.
  3.  Once the epoxy is applied, the TLC is than placed on the same
       fixture as the stiffener.  The pins in the fixture
automatically
       align the two layers making misregistration impossible.  The
TLC
       is then pressed down on top of the stiffener.
  4.  To guarantee that there is 100% contact of the two layers, a
       sheet of sulphur-free paper is placed on top of the TLC.
Using a
       non-metallic roller, the layers are rolled.  This helps to
remove
       any entrapped air and insure that there is 100% contact
between
       the two.
  5.  The attached layers are removed from the fixture and placed on
a
       cart.  A stainless steel planishing plate is placed on top of
the
       layers, and approximately 50 pounds of weight is placed on
top.
       This weight is to assure t...