How Does all industial resistor manufacturer Work?
A Comprehensive Overview of Resistors
SMD Resistors and Their Chip Structure
Understanding Screen Printing
The construction of each layer in a ROHM chip resistor utilizes the screen printing technique. This process involves creating a specific print pattern on the mesh surface of a screen mask. After the pattern is established, paste is applied, and the pattern is transferred onto a designated surface, such as an alumina substrate, by using a squeegee to scrape the paste evenly.
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Laser Trimming
Why Laser Trimming is Essential
The screen printing method is integral to forming each layer of a thick-film chip resistor by applying paste onto the alumina substrate. Since multiple chips are manufactured simultaneously, minor variations in printing conditions—such as paste thickness—are inevitable.
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This variation leads to discrepancies in resistance values, preventing the achievement of optimum resistance specifications. Thus, a supplementary process is necessary to fine-tune the resistance values to meet stipulated tolerances.
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