Browse Prior Art Database

Screening Mask Construction

IP.com Disclosure Number: IPCOM000088675D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 68K

Publishing Venue

IBM

Related People

Gibney, JT: AUTHOR [+4]

Abstract

The IBM Technical Disclosure Bulletin, Vol. 19, No. 5, October 1976, at page 1790 shows a screening mask construction for screening viscous media such as ceramic pastes. In that construction a two-layer laminate is variably patterned in each layer by etching procedures. For some applications the screening mask construction described below provides a sturdier more practical structure.

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Screening Mask Construction

The IBM Technical Disclosure Bulletin, Vol. 19, No. 5, October 1976, at page 1790 shows a screening mask construction for screening viscous media such as ceramic pastes. In that construction a two-layer laminate is variably patterned in each layer by etching procedures. For some applications the screening mask construction described below provides a sturdier more practical structure.

An ordinary wire mesh screen 1 (Fig. 1) may be bonded to a continuous metal foil layer 2 by a bonding agent which coats/covers mesh 1. The foil layer may then be etched (Fig. 2) into the desired pattern by an etchant which attacks the foil and the bonding medium 3 but not screen 1.

Screen 1 should be wider than foil layer 2 and thereby provide marginal surfaces 4 (Figs. 2, 3) for applying tension to the mask (for instance, by tensioning equipment described in the IBM Technical Disclosure Bulletin, Vol. 16, No. 7, December 1973, at page 2114).

The materials employed in layer 2 and bonding medium 3 may be made differentially etchable; that is, they may be made to be attacked by different etchant media. This would assure the security of the plating bond.

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