2048X2048 Visible/Infrared HgCdTe Focal Plane Arrays (FPAs)
Abstract
Rockwell has developed the world's largest multiplexer for use with infrared HgCdTe and visible silicon detector arrays. The resulting FPAs are to be proposed for the Next Generation Space Telescope (NGST) program, ground-based astronomy, and other low background applications. The 2048x2048 multiplexer's unit cell size is 18 micrometers x 18 micrometers with source follower per detector input (SFD) and 4 and 32 output amplifier selections. SWIR detectors with a spectral response of 0.85 micrometers to 2.5 micrometers have been processed on liquid phase epitaxy (LPE) HgCdTe on sapphire substrates. MWIR detectors (0.85-5.0 micrometers) will be processed on molecular beam epitaxy (MBE) HgCdTe on CdZnTe substrates. Response to wavelengths as low as 0.4 micrometer is possible with the substrate removal process and an example of this will be given. The multiplexer's has been designed and fabricated at Conexant (formerly Rockwell Semiconductor Systems). Room temperature probing shows that the device is functional with excellent yield 20%. Novel hybrid fabrication techniques have been used to construct the first engineering grade FPA, currently being tested. This HAWAII-2 device is based on the highly successful HAWAII 1024x1024 device and the performance will be similar.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1999
- Accession Number
- ADA390403
Entities
People
- A. K. Haas
- C. Cabelli
- J. T. Montroy
- L. J. Kozlowski
- W. E. Tennant