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3691631 METHOD OF MAKING A VOLTAGE ACTUATABLE SWITCH  
A voltage actuated switch comprises a conductor, an essentially defect-free layer of insulating material which has a portion thereof that overlies and engages at least a part of a surface of that...
3668028 METHOD OF MAKING PRINTING MASKS WITH HIGH ENERGY BEAMS  
3661648 PREPARATION OF CUPROUS CHLORIDE ELECTRODES  
Electrodes for electrochemical cells are prepared from porous copper-conting carrier bodies by immersion at ambient temperature of such bodies in cupric chloride dissolved in an organic...
3642549 ETCHING COMPOSITION INDICATION  
In the etching through a protective glass coating to expose an underlying metal, overetching is prevented by adding a polyhydric alcohol, for example glycerin, to a glass etchant, which causes a...
3626233 CHANNEL MULTIPLIER OF ALUMINUM OXIDE PRODUCED ANODICALLY  
Microchannel plates prepared from anodized aluminum layers etched to increase the pore volume to approximately 50 percent and then treated to exhibit suitable electrical properties for use as a...
3617373 METHODS OF MAKING THIN FILM PATTERNS  
Deposition of patterned thin-films of metal or metal compounds on a substrate is accomplished using a dissolvable glaze-frit mask. The frit, in pasty form, is applied to the substrate in a...
3615951 METHOD FOR ETCHING COPPER  
A method for subtractive etching copper adapted to form very fine line patterns. In the method a mask is deposited on the copper surface, the copper surface exposed to an environment containing an...
3568312 METHOD OF MAKING PRINTED CIRCUIT BOARDS  
3554877 METHOD OF MAKING PRINTED CIRCUIT ASSEMBLIES  
3465435 METHOD OF FORMING AN INTERCONNECTING MULTILAYER CIRCUITRY  
3455751 PROCESS FOR MAKING PRINTED CIRCUITS AND THE LIKE BY STEP-BY-STEP ETCHING  
3433686 PROCESS OF BONDING CHIPS IN A SUBSTRATE RECESS BY EPITAXIAL GROWTH OF THE BONDING MATERIAL  
3369293 Method of manufacturing etched circuitry  
3319317 Method of making a multilayered laminated circuit board  
3276106 Preparation of multilayer boards for electrical connections between layers  
3276927 Smoothing of mechanically drilled holes  
3265546 Chemical drilling of circuit boards  
3258898 Electronic subassembly  
3186884 Method of manufacturing grid plates  
3116191 Method of making storage electrode structure  
2910351 Method of making printed circuit  
2888336 Color coded printed circuit