<p>Polyimide is etched by contacting the polyimide with an aqueous solution of a metal hydroxide followed by contact with an acid followed by contact with an aqueous solution of a metal hydroxide. Etching of chemically cured polyimide can be enhanced by employing a presoaking in hot water. Also, partially etched chemically cured polyimide is removed with a concentrated acid solution. In preparing a metal coated polyimide structure for subsequent gold plating, two flash etching steps with the polyimide etch between are employed after developing the photoresist.</p>
申请公布号
EP0351622(A2)
申请公布日期
1990.01.24
申请号
EP19890112091
申请日期
1989.07.03
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
BARD, STEVEN LYNDZ;FEGER, CLAUDIUS;GLENNING, JOHN JOSEPH;HOUGHAM, GARETH GEOFFREY;MOLIS, STEVEN EARLE;PAWLOWSKI, WALTER PAUL;RITSKO, JOHN JAMES;SLOTA, PETER, JR.;SNYDER, RANDY WILLIAM