Apparatus for making miniature layer resistors on insulating chips by digital controls
Method for the production of mask patterns for integrated semiconductor circuits
Method of rendering an ink strippable
System and method for producing artwork for printed circuit boards
Inking system for producing circuit patterns
System and method for making changes to printed wiring boards
Apparatus for changing and repairing printed circuit boards
Thermal ink jet printhead and process therefor
ApplicationNo. 06/725817 filed on 04/16/1985
US Classes:716/19, DESIGN OF SEMICONDUCTOR MASK118/410, With pump or nongravity discharge against work216/13, FORMING OR TREATING ELECTRICAL CONDUCTOR ARTICLE (E.G., CIRCUIT, ETC.)216/41, MASKING OF A SUBSTRATE USING MATERIAL RESISTANT TO AN ETCHANT (I.E., ETCH RESIST)346/140.1With ink supply to marker
ExaminersPrimary: Krass, Errol A.
Assistant: Black, Thomas G.
Attorney, Agent or Firm
International ClassesH05K 3/06 (20060101)
H05K 3/00 (20060101)
H05K 3/42 (20060101)
AbstractA conductor clad board from which the printed circuit board is produced is operatively retained for manipulation in a plotter controlled by a computer. Etchant-resist material is laid down in a printed circuit conductor pattern on at least one conductive sheet of the board by a marking instrument operatively manipulated by the plotter. The computer controls the application of the resist material in accordance with printed circuit board computer aided design information in the computer memory. Both conductive sheets of the board can be marked with resist after establishing the orientation of the board so the printed circuit patterns on opposite sides of the board occupy a predetermined aligned relationship. After etching, the board is again retained in the plotter and holes are drilled through the board by using drill apparatus operatively adapted for use and manipulation by the plotter.