http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1650573-B1

Outgoing Links

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http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01R1-073
filingDate 2001-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date>
grantDate 2011-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f36325b3c078949cbb4ad7ab3fd37511
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publicationDate 2011-04-20-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber EP-1650573-B1
titleOfInvention Counter balanced vertical docking motion in a driven vertical test head manipulator
abstract A positioner, such as a test head carrier for a semiconductor wafer and device tester, includes a vertical support and a main arm for supporting a test head. The main arm is suspended for vernier movement by use of a counterbalancing force such as counterweights. The suspension of the main arm is performed at a mechanical advantage so that reduced counterblancing force and correspondingly large movements on the counterblance side are used to effect the vernier movement. The vertical support may be adjusted with a non-compliant drive such as a ball screw mechanism. The vernier movement can also be used to sense collisions and other positioning errors and actuation of the drive for the vertical support can be controlled accordingly.
isCitedBy http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I701449-B
priorityDate 2000-03-01-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

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Total number of triples: 23.