Packaging of a 128 by 128 liquid-crystal-on-silicon spatial light modulator using self-pulling soldering

Packaging of a 128 by 128 liquid-crystal-on-silicon spatial light modulator using self-pulling soldering

A self-pulling soldering technology has been demonstrated for assembling liquid crystal on silicon (LCOS) spatial light modulators (SLMs). Solder joints with different profiles and sizes are designed to provide vertical surface tension forces to control the gap accommodating the ferroelectric liquid...

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Veröffentlicht in:IEEE photonics technology letters 1995-09, Vol.7 (9), p.1010-1012
Hauptverfasser: Ju, T.H., Lin, W., Lee, Y.C., McKnight, D.J., Johnson, K.M.
Format: Artikel
Sprache:eng
Schlagworte:
Assembly
Automatic control
Ferroelectric materials
Force control
Liquid crystal on silicon
Optical modulation
Packaging
Size control
Soldering
Surface tension
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Beschreibung
Zusammenfassung:A self-pulling soldering technology has been demonstrated for assembling liquid crystal on silicon (LCOS) spatial light modulators (SLMs). Solder joints with different profiles and sizes are designed to provide vertical surface tension forces to control the gap accommodating the ferroelectric liquid crystal (FLC) layer in the range of a micron with sub-micron uniformity. This technology provides an automatic, batch assembly process for a LCOS SLM through one reflow process. The component designs and process optimization are described, and the first operational results are presented.< >
ISSN:1041-1135
1941-0174
DOI:10.1109/68.414685