🚀 go-pugleaf

On Fri, 11 Jan 2002 01:47:14 GMT,
"Spehro Pefhany" <speff@interlog.com>,
In Newsgroup: sci.electronics.design,
Article: <Cur%7.164767$pa1.49053968@news3.rdc1.on.home.com>,
Entitled: "Re: Making thick-film resistors",
Wrote the following:

|In sci.electronics.design Russell Shaw <rjshaw@iprimus.com.au> wrote:
|
|> I need to make small resistors (10-200ohms) operate at a
|> few GHz, and so be non-inductive/capacitive. I can do it
|> by depositing carbon paste with a stencil.
|
|You should be able to buy this stuff from the makers of inks for
|thick-film hybrids. You can silk screen it on (control of viscosity,
|pressure and squeegee angle and spacing from the substrate are all
|important in controlling the thickness). Then it is "fired" at a high
|temperature. You can trim said resistors with abrasive or lasers. 
|
|Is it really such a big deal with regular resistors? I can't imagine an
|0402 or 0201 resistor 10-200R resistor having much inductance or
|capacitance at those frequencies. 
|
|Best regards,
|Spehro Pefhany

And good fun, "firing" will melt/toast PCB's, so you have to have a
ceramic (alumina typically) substrate.

                                  ...Jim Thompson
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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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|  Jim-T@analog_innovations.com  Fax:(480)460-2142  |  Brass Rat  |
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