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Browse Prior Art Database

Water Soluble Solder Mask

IP.com Disclosure Number: IPCOM000088205D
Original Publication Date: 1977-May-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Cole, SM: AUTHOR [+2]

Abstract

Pentaerythritol is a water-soluble material useful as masking material in the manufacture of circuit packages soldered to a ceramic or metal substrate. The pentaerythritol is melted onto the ceramic substrate in the preferred areas. The mask remains intact during soldering, since its melt temperature is greater than solder temperature. After soldering, the mask is removed by water-washing and the substrate is clean for subsequent soldering operations. This eliminates entrapment of solvents in the mask and does not produce residues which affect subsequent soldering operations.

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Water Soluble Solder Mask

Pentaerythritol is a water-soluble material useful as masking material in the manufacture of circuit packages soldered to a ceramic or metal substrate. The pentaerythritol is melted onto the ceramic substrate in the preferred areas. The mask remains intact during soldering, since its melt temperature is greater than solder temperature. After soldering, the mask is removed by water-washing and the substrate is clean for subsequent soldering operations. This eliminates entrapment of solvents in the mask and does not produce residues which affect subsequent soldering operations.

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