Abstract:
A method for coating a conductive surface with an organic coating where one discrete area of the organic coating is coated onto the surface in an image pattern by conventional means and another discrete area of the organic coating is electrophoretically deposited onto the surface. The process is useful for diverse applications including the fabrication of printed circuit boards.
Abstract:
A process for manufacturing a 3-dimensional circuit board by electrophoretic deposition whereby a) providing the board with a conductive surface and b) applying a photoresist by electrophoretic deposition.
Abstract:
A method for coating a conductive surface with an organic coating where one discrete area of the organic coating is coated onto the surface in an image pattern by conventional means and another discrete area of the organic coating is electrophoretically deposited onto the surface. The process is useful for diverse applications including the fabrication of printed circuit boards.
Abstract:
The invention provides radiation sensitive compositions that comprise an amphoteric polymer, the polymer comprising at least two distinct carrier groups so that the polymer is positively polarized or negatively polarized upon treatment with an acid or base, respectively, enabling the compositions to be electrodeposited either anaphoretically or cataphoretically. Employing this amphoteric polymer in a radiation sensitive composition also allows the use of either an acid or base solution to image and remove the deposited composition irrespective of whether the composition was applied cataphoretically or anaphoretically. The compositions of the invention are also suitably formulated as liquid coating compositions or used to form dry film resists.
Abstract:
A process for manufacturing a 3-dimensional circuit board by electrophoretic deposition whereby a) providing the board with a conductive surface and b) applying a photoresist by electrophoretic deposition.
Abstract:
It has been discovered that both water soluble or partially water soluble and water insoluble agents lower the operating temperature of electrodepositable photoresist compositions and substantially increase both lifetime stability and temperature stability of the bath. These additives, because of their low volatility and their partition coefficients, essentially remain in the emulsion system and are removed upon codeposition with the photoresist where they act to improve film quality and control thickness.
Abstract:
This invention provides a means of controlling the composition of electrodepositable photoresists emulsion. The system removes contaminants from the bath which may adversely effect the quality of the deposited coatings and allows for continuous monitoring of the conductivity of the system.
Abstract:
It has been discovered that both water soluble or partially water soluble and water insoluble agents lower the operating temperature of electrodepositable photoresist compositions and substantially increase both lifetime stability and temperature stability of the bath. These additives, because of their low volatility and their partition coefficients, essentially remain in the emulsion system and are removed upon codeposition with the photoresist where they act to improve film quality and control thickness.