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Browse Prior Art Database

REVERSED CAP DETECTOR

IP.com Disclosure Number: IPCOM000008258D
Original Publication Date: 1997-Sep-01
Included in the Prior Art Database: 2002-May-30
Document File: 2 page(s) / 87K

Publishing Venue

Motorola

Related People

Bong Tae Kim: AUTHOR

Abstract

Ceramic Dual-Inline Package (C-DIP) products consist of base and cap. They should be sealed with right polarity, but sometimes the cover is attached reversely on base, which may pass at final test and ship to the end customer. To screen out reversed cap completely, a reversed detector system was developed.

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MO-A Technical Developments

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REVERSEDCAPDETECTOR

by Bong Tee Kim

  Ceramic Dual-Inline Package (C-DIP) products consist of base and cap. They should be sealed with right polarity, but sometimes the cover is attached reversely on base, which may pass at final test and ship to the end customer. To screen out reversed cap completely, a reversed detector system was developed.

CURRENT PROCESS

  In current lead clip process, the reversed cover occurred at cover loader was marked and passed at final test process. There are no permanent system orients one side notch direction. The rejects often pass at visual inspection and ship to customer,

SA SB SC DECISION=(B+C)

0 0 0 0RIENTER"ON"

Fig. 1 Operation Principles of Existing Detection System.

OPERATING DESCRIPTION

Cylinder Cl, C2: send a unit to orientor

MODIFICATION OF SYSTEM

Changed sensor position to detect reversed cap at both side direction and attached stop cylinder.

OPERATION DESCRIPTION

  The Pin 2 of LM339 is clock pulse and sensing "SA" and "SB" signal at the "SC" position, and processing to reversed cap. Operating the orienter cylinder thru Pin 6 of SN74LS08 and Pin 1, 3 of LM339, if orient unit detect in sensor "SA" and "SB." If detected the reversed cover, exacted it as Pin 3 of SN74LS08 operate cap cylinder thru Pin 1, 13 of MC4013. VR-A, B, C adjust sensing timing of "SA," " SB," and "SC." VR-D is able to adjust the operation time of cylinder.

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Sensor SA: it is located in the center of the loaded device, send cl...