Re: Making thick-film resistors

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#2477

From: Boris Mohar
Date: Fri, 11 Jan 2002 14:20

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On Fri, 11 Jan 2002 14:52:07 +1100, Russell Shaw <rjshaw@iprimus.com.au>
wrote:

>
>
>Boris Mohar wrote:
>> 
>> On Fri, 11 Jan 2002 13:31:31 +1100, Russell Shaw <rjshaw@iprimus.com.au>
>> wrote:
>> 
>> >Spehro Pefhany wrote:
>> >>
>> >> 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.
>> >
>> >Various resistors use a 'zig-zag' of thin track, which may
>> >get inductive relative to 10ohms at a relatively low
>> >frequency compared to a carbon composition one.
>> 
>>  The resistors that Sphereo mentioned are surface mount on ceramic
>> substrate.  I have used these in sampling circuits that required 120ps
>> sampling pulses.  The parasitic attributes of resistors did not give me
>> any trouble.
>
>Are these 'normal' surface-mount resistors soldered onto
>a ceramic pcb?

 Ceramic PCB?  Are you describing hybrids?  0603 defines th outside
dimensions of 0.06" x 0.03" ceramic substrate. The substrate is 0.018"
thick. The resistor is deposited on one side. The two ends are metalized
for solderability.  They can be soldered on any kind of pcb.


Regards,

Boris Mohar

VIATRACK Printed Circuit Designs

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From: Boris Mohar <borism@sympatico.ca>
Newsgroups: sci.electronics.design,aus.electronics
Subject: Re: Making thick-film resistors
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