Metal working – Method of mechanical manufacture – Electrical device making
Patent
1995-03-02
1996-04-09
Echols, P. W.
Metal working
Method of mechanical manufacture
Electrical device making
29847, 21912169, 338195, 427101, H01C 1706
Patent
active
055049869
ABSTRACT:
A collinear terminated transmission line structure and method for producing same is presented. The structure comprises a plurality of conductors electrically connected to a plurality of resistors. A predetermined spacing between each of the plurality of conductors ranges from 2 mils to 7 mils. Greater spacings are easily accomplished with the present method. The method comprises the steps of screen-printing a resistor swath onto a substrate, the swath being adjacent to one end of the plurality of conductors. After the substrate is dipped into a solution, the resistor swath is laser trimmed to form the plurality of resistors. The substrate is then rinsed with warm water to remove the solution. The solution can be a poly-vinyl alcohol and isopropyl alcohol mixture.
REFERENCES:
patent: 4146673 (1979-03-01), Headley
"Photomask Coating" Transene Company, Inc. Bulletin No. 227, Jan. 1980 1 page.
"BIROX Series 17 Resistor compositions" DuPont Electronics pp.1-16 Jul. 1991.
Casey John F.
Dove Lewis R.
Schroeder Ronald W.
Yearsley Philip J.
Echols P. W.
Hewlett--Packard Company
Murphy Patrick J.
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