Browse Prior Art Database

Foil Peeler

IP.com Disclosure Number: IPCOM000085631D
Original Publication Date: 1976-May-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Austenfeld, RS: AUTHOR [+3]

Abstract

A device is described for peeling the outer layer of a double-thick "peel apart" copper foil from the substrates to which the double-thick copper foil has been laminated.

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Foil Peeler

A device is described for peeling the outer layer of a double-thick "peel apart" copper foil from the substrates to which the double-thick copper foil has been laminated.

Typically a double-thick copper foil may consist of an outer layer of 2 ounce copper 11 (approximately 2.8 mils thick), with an inner layer 13 of 0.2 mil thick copper sheet material. The double-thick copper foil is laminated to a substrate 15, which may be a dielectric material, such as epoxy-glass, and prior to circuitizing, the outer 2 ounce copper foil 11 must be removed from the assemblage to leave the 0.2 mil copper surface for processing.

The device shown in the figure consists of a stainless steel tube 17, with a slot 19 through its outer wall. Each end of the tube 17 is supported by a suitable bearing and the inside of the tube in the slot area is fitted with a rotating cam, not shown. The cam locks the leading edge 21 of the outer layer 11 of copper foil material to be peeled, which foil is removed from the assemblage without damage to the laminate, with the point of separation between the foil 11 and the substrate 15 occurring as shown.

The outer foil layer 11 is removed by rotating the stainless steel tube 17, whereby the outer foil layer wraps itself around the tube until the total sheet is stripped from the substrate 15. While this is being done, the laminate travels across the bearing surface, face down, which minimizes exposure of the 0.2 mil copper layer 13 laminated...