A control system for laser trimming thick film resistors and the reliability effects

dc.contributor.authorWalters, Ryp R.en
dc.contributor.departmentElectrical Engineeringen
dc.date.accessioned2014-03-14T21:28:06Zen
dc.date.adate2009-01-31en
dc.date.available2014-03-14T21:28:06Zen
dc.date.issued1992en
dc.date.rdate2009-01-31en
dc.date.sdate2009-01-31en
dc.description.abstractSince the development of thick film hybrid microelectronic processing, there has been a need for methods to adjust for tighter tolerances for electrical components through a trimming process. Components/elements, as produced, show a tolerance of the order of ±10% due to the variability of the screen printing process associated with film curing conditions. The methods that have arisen from this need encompass a variety of technologies and techniques. The usefulness of each method is based on its operation, flexibility, repeatability, and post-trim effects on the resistor's reliability. The work in this thesis concerns the laser trimming of resistor components to a tight tolerance. It is the objective of this thesis to address the performance of an Nd:YAG laser operation and interface with a computer. The first task involves a computer hardware system to be interfaced to the laser control system, this task includes both design and implementation. The second task consists of a software operating environment to be flowcharted, written, and tested. The third task involves the computer interface driving the laser in the process of trimming resistor components using different types of cuts. The trimmed resistor performance is evaluated as part of the study.en
dc.description.degreeMaster of Scienceen
dc.format.extent343 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-01312009-063402en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-01312009-063402/en
dc.identifier.urihttp://hdl.handle.net/10919/40848en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1992.W347.pdfen
dc.relation.isformatofOCLC# 25484759en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1992.W347en
dc.subject.lcshElectric resistors, Filmen
dc.subject.lcshLaser beam cuttingen
dc.subject.lcshMicroelectronicsen
dc.subject.lcshThick filmsen
dc.titleA control system for laser trimming thick film resistors and the reliability effectsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineElectrical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen
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