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US 2003/0129030 A1Published application
Lubricant sheet and method of forming the same
AssigneeJJA, Inc.
InventorRobert M. Johnston
Life of this patent
Estimating the term…
Abstract
A lubricant sheet for use in drilling holes in a printed circuit board, comprised of a porous, fibrous, organic sheet impregnated with a water-soluble lubricant. The lubricant is comprised essentially of polyethylene glycol having a weight average molecular weight between 4,500 and 7,000, and a surfactant.
Claims12
A lubricant sheet for use in drilling holes in a printed circuit board, comprised of:
- a porous, fibrous, organic sheet impregnated with a water-soluble lubricant, said lubricant comprised essentially of polyethylene glycol having a weight average molecular weight between 4,500 and 7,000, and a melting temperature greater than 120° F.
Dependencies are inferred from the claim text.