Laser Resistor Trimming Services

Laser trimming of passive or active components, typically resistors, has become an indispensable tool for the production of microelectronic devices where high precision and performance is required. Laserod has provided laser trimming systems and services to scores of customers for nearly forty years.

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Simply described, the laser trimming process modifies the value of a resistor by laser removing resistor film material in a specific manner at a specific location. Resistance value of a film resistor is determined by its geometric dimensions. A lateral laser cut in the resistor narrows or lengthens the current flow path and increases the resistance value.

Passive Trimming is the adjustment of a resistor to a given value to increase its resistance. During the trimming process, the resistance or capacitance is monitored across the component until the target value is reached.

Active Trimming is the removal of material from a component to change a circuit parameter while the circuit is functioning. Parameters monitored are voltage, current, period, frequency.

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