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Using Laser Trimmable Resistors

Authored on: Aug 9, 2013 by Thomas Bluhm

Technical Paper / Application Note

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Recently, trimmable resistors have been in high demand due to their properties. Many manufacturers of electronic equipment see the benefits of using these components in theory; however, the results can be quite different in practice without knowledge of laser trimming technology. To fully realize the benefits of these devices, it is necessary to carefully set up and control the trimming process, which will also greatly influence the component's achievable performance. This application note will explore trimmable resistors and the trimming process.
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zeeglen Posted Sep 6, 2013

Interesting appnote, but there is an error on page 3 in the table “Typical Laser Parameter”. The wavelength is stated as 1064 millimeters (mm) which puts the frequency close to 300 MHz, which is radio, not optical. The correct unit should be nanometers (nm), a million times smaller.

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BobbyDC Posted Dec 11, 2013

Interesting article. My interest would be to have some laser trimmed resistors at the wafer level versus on ceramic. Does the author know what companies might provide thin film resistor patterning at the wafer level for fabless semiconductor companies??

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