Browse Prior Art Database

Mylar Covering During Sizing

IP.com Disclosure Number: IPCOM000048961D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Chiaiese, VC: AUTHOR [+3]

Abstract

In multilayer ceramic (MLC) production processes, a transparent MYLAR* cover is normally placed on top and bottom of a sheet stack. The covered stack is placed in a lamination press and the press is run through its cycle. The laminated stack, called a laminate, is removed from the press and placed between two flat cooling platens. After cooling, the MYLAR cover sheets are removed and the laminate is sent to sizing operation, e.g., to be cut into substrates.

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Mylar Covering During Sizing

In multilayer ceramic (MLC) production processes, a transparent MYLAR* cover is normally placed on top and bottom of a sheet stack. The covered stack is placed in a lamination press and the press is run through its cycle. The laminated stack, called a laminate, is removed from the press and placed between two flat cooling platens. After cooling, the MYLAR cover sheets are removed and the laminate is sent to sizing operation, e.g., to be cut into substrates.

With the advent of laser sizing, it was discovered that the top MYLAR cover could be left on right through the sizing process. The CO(2) laser with a 10.6- micrometer radiation cuts through the MYLAR into the laminate below. The MYLAR is heated by the laser and melts, producing a hermetic seal along the edge of the substrate. The sealed MYLAR protects the top of the substrate from all the ceramic dust and hanling damage. The MYLAR is kept on during the cleaning operation and taken off when it is sent to be sintered. * Trademark of E.
I. du Pont de Nemours & Co.

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