US 5,507,872 AGranted

Contact sensor-based microdispensing tool

AssigneeInternational Business Machines Corporation

InventorsAnnette B. Antenucci, Michael Berger, Judy E. Lambert, David T. Naugle, Stephen A. Olson, Jae M. Park, Thomas Rednour, Benoit Ventimiglia, Richard J. Weckesser

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Abstract

A contact-based microdispensing tool for delivering extremely minute globules of epoxy material to repaired sites on high circuit density modules. The tool includes a solid probe integrally mounted in a contact sensor assembly incorporating an air-levitated core of a linear voltage differential transducer. The levitated core and the probe connected thereto are supported in neutral equilibrium by an air bearing assembly. As the assembly probe is brought into contact with one of the sites, the globule flows upon the site, the equilibrium is disturbed and a signal is produced by the transducer to halt movement of the probe relative to the site.

Claims8

Dependent claims

An apparatus for dispensing a minute amount of liquid material onto a site of a substrate comprising:

a probe for dispensing liquid material, said probe having a tip;
a member;
a contact sensor connected to said probe by said member and movable with said probe relative to said site, said contact sensor having an equilibrium position;
a transducer having a core for receiving said contact sensor, said contact sensor being movable with respect to said transducer, said transducer producing a signal when said contact sensor is moved from its equilibrium position;
said contact sensor being moved from its equilibrium position upon said tip contacting said site, whereby said tip dispenses said liquid upon contacting said site.

2 more elements

Dependencies are inferred from the claim text.