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3409487
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Information
Patent Grant
3409487
References
Source
Patent Number
3,409,487
Date Filed
Not available
Date Issued
Tuesday, November 5, 1968
56 years ago
CPC
H05K3/061 - Etching masks
C03C15/00 - Surface treatment of glass , not in the form of fibres or filaments, by etching
C08L61/06 - of aldehydes with phenols
C08L71/02 - Polyalkylene oxides
C23F1/02 - Local etching
C25F3/14 - locally
G03F7/0212 - characterised by the polymeric binder or the macromolecular additives other than the diazo resins or the polymeric diazonium compounds
G03F7/0381 - using a combination of a phenolic resin and a polyoxyethylene resin
H01L21/3063 - Electrolytic etching
H01L21/3081 - characterised by their composition
H01L21/31111 - by chemical means
H01L21/31144 - using masks
H01L21/32134 - by liquid etching only
H01L49/02 - Thin-film or thick-film devices
H05K3/0076 - characterised by the composition of the mask
H05K2201/0116 - Porous
US Classifications
430 - Radiation imagery chemistry: process, composition, or product thereof
216 - Etching a substrate: processes
257 - Active solid-state devices
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