Browse Prior Art Database

Fabrication of Isotropic Liquid Crystal Polymer Films

IP.com Disclosure Number: IPCOM000103431D
Original Publication Date: 1990-Nov-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 36K

Publishing Venue

IBM

Related People

LaFrese, LC: AUTHOR [+3]

Abstract

Disclosed is a process to fabricate isotropic liquid crystal polymer films. The process uses a combination of electrostatic powder coating and compression sheet molding. This method will produce a film with an isotropic coefficient of thermal expansion (CTE) compared to conventional techniques such as injection molding or melt extrusion which produce anisotropic material. (Image Omitted)

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Fabrication of Isotropic Liquid Crystal Polymer Films

      Disclosed is a process to fabricate isotropic liquid crystal
polymer films.  The process uses a combination of electrostatic
powder coating and compression sheet molding. This method will
produce a film with an isotropic coefficient of thermal expansion
(CTE) compared to conventional techniques such as injection molding
or melt extrusion which produce anisotropic material.

                            (Image Omitted)

      To produce an isotropic film, a fine powder of liquid crystal
polymer (LCP) is applied to one side of a metallic substrate using
electrostatic powder coating.  This randomly orients the LCP
particles on the substrate.  The coated substrate is processed
through a high temperature furnace so the LCP powder will reflow and
adhere to itself and the substrate.  The coated substrate is
laminated to another metallic substrate in a high temperature
lamination press. The metal is etched leaving a uniform, isotropic
film of LCP.

      Disclosed anonymously.