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Method for an internally wired barcode scanning with an in-circuit tester

IP.com Disclosure Number: IPCOM000006572D
Publication Date: 2002-Jan-15
Document File: 4 page(s) / 21K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for internally wired barcode scanning with an in-circuit tester. Benefits include improved productivity and improved reliability.

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Method for an internally wired barcode scanning with an in-circuit tester

Disclosed is a method for internally wired barcode scanning with an in-circuit tester. Benefits include improved productivity and improved reliability.

Background

              Automated scanning with external wiring solution was cumbersome for the following reasons:

•             Fixtures are changed frequently in the circuit board manufacturing environment.

•             An external cable would be required to be plugged/unplugged each time a fixture is installed/removed from the tester.

•             Cable and socket wear easily become an issue.

•             Failure to remove a cable could cause damage to both cable and socket, resulting in increased time to switch fixtures.

              One conventional connection method (see Figure 1) uses an external cable from the scanner on the test fixture to a socket on host controller. The cable must be unplugged from the scanner every time the fixture is removed from the tester, and it has to be plugged in when the fixture is installed on the tester.

General description

              The disclosed method internally connects an in‐circuit test controller with the barcode scanner mounted on the test fixture. The key elements of the method include:

•             Hybrid cards and functional ports to establish a connection between the controller and the barcode scanner

•             Barcode scanner powered by the tester power supply rather than an external power source

•             No external cable required from the test fixture to the tester controller

Advantages

              The disclosed internal connection method does not require an external cable to establish a connection between the scanner and the tester or controller. This approach eliminates concerns about external cables, plug or socket damage, and increased time for switching fixtures. As a result, productivity and reliability are improved.

Detailed Description

Hardware

              The scanner sits on the top plate of the fixture (see Figure 2). A 12‐pin Zero Insertion Force (ZIF) cable comes out from the scanner and is wired to the fixture-transfer probe through the connector at the back of the fixture. From the fixture trans...