MICROMINIATURE CRYSTAL UNITS CR-(X-47)/U.
Abstract
Modification of the header ceramic seal was necessary to prevent fracture. Ceramic thickness was increased to .030' so that ceramic seal cound withstand the 90 degree lead bend test without fracture. Ceramic diameter was reduced to .185' in order to accommodate more braze material between 52 alloy compression ring and ceramic. Two crystal blank designs at 15 mc. were investigated. The partially contoured design had superior performance to a flat blank design. The effects on two types of conductive epoxy cement on crystal parameters were also investigated. Five electron-beam sealing experiments are described. Weld schedule optimization is being accomplished using cut-and-try techniques. The most significant problem in sealing is ceramic fracture due to use of improper weld schedules. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 30, 1964
- Accession Number
- AD0603029
Entities
People
- W. G. Stoddard
Organizations
- General Electric