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In Process Protection of Printed Circuit/ Circuit Module

IP.com Disclosure Number: IPCOM000048415D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 63K

Publishing Venue

IBM

Related People

Avazian, JF: AUTHOR [+9]

Abstract

This scheme minimizes damage to sensitive areas of boards while in process, in between processing steps and in storage.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 77% of the total text.

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In Process Protection of Printed Circuit/ Circuit Module

This scheme minimizes damage to sensitive areas of boards while in process, in between processing steps and in storage.

Fig. 1 shows a frame 10 which serves as a cleaning fixture during the cleaning operations for the board. The new frame has hinges 12 which accept top and bottom vacuum formed, clear plastic detachable covers 14 and 16 for protection during processing, transport and storage. On the board, added protection is provided for individual sites through the use of injection molded clear plastic covers 20 for each site. These covers 20 are removed at a site that requires rework.

After the frame 10 has been replaced by a permanent stiffener 22 (Fig. 2), individual module sites 18 are protected by individual injection molded clear plastic housings 24 with tapered holes for ease of assembly and disassembly. Again, the housings 24 are removed only on sites that need rework.

In order to reduce erroneous tester readings due to dust and contamination, each site 18 is also provided with a dust cover 26. These injection molded dust covers 26 are designed to seal the openings by a friction fit onto the stiffener assembly openings 28.

Clear plastic top and bottom covers 14 and 16 are attached to the board assembly by the same hinge mechanism described previously. These covers are removed only as required; if work is being performed on the module side, the covering on the wiring side remains attached and serves...