Accession Number : ADP005202

Title :   Development of a Semi-Automated Machine for Repair of Surface Mounted Printed Circuits,

Corporate Author : SRTECHNOLOLGIES INC CONCORD MA

Personal Author(s) : Spigarelli,Donald J. ; Drislane,William F.

Report Date : FEB 1987

Pagination or Media Count : 22

Abstract : The major problem areas in removal and replace of surface mount devices, especially those with fine pitch and high lead counts, and the capabilities required to solve those problems are discussed. The major problem areas are solder reflow of surface mount devices (SMDs) without damage to the device itself or adjacent devices and solder joints, accurate pick and place, controllability of the important parameters in the repair process, and flexibility in dealing with different devices. The design of a machine which addresses these problems, the SRM-100, is described. The SRM-100 achieves an RMS placement repeatability of 0.0016 inches, and demonstrates the ability to reflow SMD solder joints while maintaining the device center and adjacent devices and solder joints at a low enough temperature to prevent damage. All important parameters are controlled by a microprocessor and are stored in nonvolatile memory as repair cycles which may be called up by the operator. (Author)

Descriptors :   *REPAIR, *PRINTED CIRCUIT BOARDS, SOLDERED JOINTS, REMOVAL, HEATING, DAMAGE ASSESSMENT, NONVOLATILE MEMORIES, HEAT TOLERANCE

Subject Categories : Mfg & Industrial Eng & Control of Product Sys
      Machinery and Tools
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE