Relief imaging liquids
AssigneeW. R. Grace & Co.
InventorsPaul Boduch, Robert Trasavage
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Abstract
A method of relief imaging liquids, particularly in manufacturing circuit boards, by providing a film of liquid photopolymer, solidifying the liquid by chemical hardening using actinic light, then pattern exposing the solidified film to actinic light to differentially chemically condition the film and then removing the portions of the film not exposed to the patterened exposure of actinic light. Also the product produced by the method.
Claims14
A method of relief imaging a liquid polymeric composition comprising forming said liquid polymeric composition into a liquid mass, exposing said liquid mass to a first polymerizing actinic radiation chemical hardening treatment sufficient to solidify said liquid mass, thereafter further treating said solidified mass with polymerizing actinic radiation in a pattern and differentiating the chemical condition of said solidified mass in said pattern from the chemical condition of said solidified mass not in said pattern and thereafter selectively removing the portion of said solidified mass subjected to only said first polymerizing actinic radiation leaving that portion of said solidified mass subjected to said further polymerizing actinic radiation as a relief image.
A relief image formed by the process of forming a liquid polymeric composition into a liquid mass, exposing said liquid mass to a first polymerizing actinic radiation chemical hardening treatment sufficient to solidify said liquid mass, thereafter further treating said solidified mass with polymerizing actinic radiation in a pattern and differentiating the chemical condition of said solidified mass in said pattern from the chemical condition of said solidified mass not in said pattern and hereafter selectively removing the portion of said solidified mass subjected to only said first polymerizing actinic radiation leaving that portion of said solidified mass subjected to said further polymerizing actinic radiation as a relief image.
A relief image as claimed in claim 14 wherein said relief image is between about 0.1 and about 5 mils thick.
Dependencies are inferred from the claim text.