Accession Number : ADA299956

Title :   Polymer Light Emitting Diodes on Silicon Substrates for Optical Chip Interconnects.

Descriptive Note : Technical rept.,

Corporate Author : UNIAX CORP SANTA BARBARA CA

Personal Author(s) : Parker, Ian D.

PDF Url : ADA299956

Report Date : 15 APR 1995

Pagination or Media Count : 7

Abstract : Work for the last month has focussed on two main areas: (i) spinning conformal, thin films of the electroluminescent polymer onto the patterned Si circuit, and (ii) fabricating test LEDs onto substrates with electrodes made from oxidised aluminium - to mimic the electrodes fabricated on the Si circuit. (i) Conformal coatings: The design of the silicon integrated circuit (onto which the polymer LEDs will be fabricated) gives rise to a non-planar surface (see figure 1). The magnitude of the surface roughness was measured using a DEKTAK profilometer showing maximum peak-to-valley differences of 14,000A (see figure 2). This may cause problems for the LED fabrication since the polymer film is ideally only 1000A and this film must be uniform to better than 10%. Spin-coating tests were performed to determine how uniformly the polymer coats this rough surface. Figure 3 shows that the coating is reasonably conformal with the valleys being covered slightly more deeply than the peaks, resulting in a coated peak-to-valley difference of approx. 10,000A. The 40 micron repeat structure of the pixels can easily be seen. Electron microscope examination of the spin-coated layers is in progress. (ii) Devices were fabricated on Al/Al oxide substrates in order to mimic the pixel surface on the Si substrates. jg p.1

Descriptors :   *POLYMERS, *SUBSTRATES, *SILICON, *CIRCUIT INTERCONNECTIONS, *OPTICAL EQUIPMENT COMPONENTS, *LIGHT EMITTING DIODES, ELECTRON MICROSCOPES, THIN FILMS, SURFACE ROUGHNESS, INTEGRATED CIRCUITS, MICROSCOPY, SURFACES, COATINGS, OXIDES, ALUMINUM, ELECTRODES, POLYMERIC FILMS, SPINNING(MOTION), NONPLANAR, VALLEYS, CONFORMAL STRUCTURES.

Subject Categories : Electrical and Electronic Equipment
      Polymer Chemistry
      Coatings, Colorants and Finishes
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE