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- Q1457342 subject Q8728768.
- Q1457342 abstract "Laser trimming is the manufacturing process of using a laser to adjust the operating parameters of an electronic circuit.One of the most common applications uses a laser to burn away small portions of resistors, raising their resistance value. The burning operation can be conducted while the circuit is being tested by automatic test equipment, leading to optimum final values for the resistor(s) in the circuit. The resistance value of a film resistor is defined by its geometric dimensions (length, width, height) and the resistor material. A lateral cut in the resistor material by the laser narrows or lengthens the current flow path and increases the resistance value. The same effect is obtained whether the laser changes a thick-film or a thin-film resistor on a ceramic substrate or an SMD-resistor on a SMD circuit. The SMD-resistor is produced with the same technology and may be laser trimmed as well.Trimmable chip capacitors are built up as multilayer plate capacitors. Vaporizing the top layer with a laser decreases the capacitance by reducing the area of the top electrode.Passive trim is the adjustment of a resistor to a given value. If the trimming adjusts the whole circuit output such as output voltage, frequency, or switching threshold, this is called active trim. During the trim process, the corresponding parameter is measured continuously and compared to the programmed nominal value. The laser stops automatically when the value reaches the nominal value.".
- Q1457342 thumbnail Laser_Trimmed_Precision_Thin_Film_Resistor_Network.JPG?width=300.
- Q1457342 wikiPageWikiLink Q1570432.
- Q1457342 wikiPageWikiLink Q1815901.
- Q1457342 wikiPageWikiLink Q182221.
- Q1457342 wikiPageWikiLink Q187868.
- Q1457342 wikiPageWikiLink Q191042.
- Q1457342 wikiPageWikiLink Q2468681.
- Q1457342 wikiPageWikiLink Q352090.
- Q1457342 wikiPageWikiLink Q363815.
- Q1457342 wikiPageWikiLink Q37156.
- Q1457342 wikiPageWikiLink Q382811.
- Q1457342 wikiPageWikiLink Q38867.
- Q1457342 wikiPageWikiLink Q5321.
- Q1457342 wikiPageWikiLink Q8728768.
- Q1457342 comment "Laser trimming is the manufacturing process of using a laser to adjust the operating parameters of an electronic circuit.One of the most common applications uses a laser to burn away small portions of resistors, raising their resistance value. The burning operation can be conducted while the circuit is being tested by automatic test equipment, leading to optimum final values for the resistor(s) in the circuit.".
- Q1457342 label "Laser trimming".
- Q1457342 depiction Laser_Trimmed_Precision_Thin_Film_Resistor_Network.JPG.