摘要:
A porous film 64 is used to thermally insulate sensing integrated circuitry 44 from pixels 34 of an uncooled IR detector hybrid system 30. The porous film 64 is preferably a silicon-dioxide xerogel. A protective film 65 may be deposited on the porous film 64.
摘要:
A porous dielectric material such as silica-based aerogel is used as the dielectric layer 48 between the gate and the cathode on the emitter plate 12 of a field emission device. Aerogel, which can have a relative dielectric constant as low as 1.03, is deposited over the resistive layer 44 of the emitter plate 12. Metal layer 49, functioning as the gate electrode, is subsequently deposited over the aerogel layer 48. The use of aerogel as a gate dielectric reduces power consumption. In a disclosed embodiment, aerogel layer 48 is comprised of sublayers 48a, 48b, and 48c of aerogels of differing densities, thereby providing better adhesion of the aerogel gate dielectric to both the resistive layer 44 and metal layer 49. Methods of fabricating the aerogel gate dielectric are disclosed.
摘要:
This invention provides a process for making a semiconductor device with reduced capacitance between adjacent conductors. This process can include applying and gelling one or more solutions between and over conductors 24 and drying the wet gel to create at least porous dielectric sublayers 28 and 29. By varying the composition of the solutions, gelling conditions, drying temperature, composition of the solvents in the wet gel, or a combination of these approaches, the porosity of the sublayers may be tailored individually. A non-porous dielectric layer 30 may be formed over porous layer 28, which may complete an interlayer dielectric. A novel process for creating the porous dielectric layer is disclosed, which can be completed at vacuum or ambient pressures, yet results in porosity, pore size, and shrinkage of the dielectric during drying comparable to that previously attainable only by drying gels at supercritical pressure.
摘要:
In one form of the invention, a method for the growth of an epitaxial insulator-metal structure on a semiconductor surface comprising the steps of maintaining the semiconductor surface at a pressure below approximately 1.times.10.sup.-7 mbar, maintaining the semiconductor surface at a substantially fixed first temperature between approximately 25.degree. C. and 400.degree. C., depositing an epitaxial metal layer on the semiconductor surface, adjusting the semiconductor surface to a substantially fixed second temperature between approximately 25.degree. C. and 200.degree. C., starting a deposition of epitaxial CaF.sub.2 on the first metal layer, ramping the second temperature to a third substantially fixed temperature between 200.degree. C. and 500.degree. C. over a time period, maintaining the third temperature until the epitaxial CaF.sub.2 has deposited to a desired thickness, and stopping the deposition of epitaxial CaF.sub.2 on the first metal layer.
摘要:
This is a device and method of forming air gaps in between metal leads comprising. The method comprising: forming the metal leads 51-53 on an insulating layer 50; depositing a nonwetting material layer 56 on the metal leads 51-53 and the insulating layer 50; anisotropically etching the nonwetting material 56 to remove the nonwetting material 56 from open areas and leaving the nonwetting material on side walls of the metal leads 51-53; and depositing a dielectric layer 60 on top of the metal leads 51-53, and the insulating layer 50, whereby the air gaps 58 are produced in between the metal leads 51-53 below the dielectric layer 60. The method may include anisotropically etching at an angle, not vertical, whereby the etching allows removal of the nonwetting material from exterior side walls of the metal leads. The method may also include leaving the nonwetting material layer in between the metal leads. The deposition of the dielectric layer may utilize plasma deposition and spin on techniques.
摘要:
This is a device and method of forming such, wherein the device has an amorphous "TEFLON" (TFE AF) layer. The method comprising: depositing an TFE AF layer 36 on a substrate; combining a fluorosurfactant with a first material to produce a second material 38; and depositing the second material 38 on the TFE AF layer 36. The method may include: patterning and etching the second material; removing the second material; and forming a third material 42 on the TFE AF layer 44. The third material may be a metal or a semiconductor. The ZFSNF fluorosurfactant may be combined with a photoresist and then patterned and etched. The TFE AF layer may also be heated. A second coating of the second material may also be added.
摘要:
A method and apparatus (242) generates intense spectral emissions (68) by associating a porous-Si layer (230) with a rare earth-doped CaF.sub.2 film (234) so that the rare earth-doped CaF.sub.2 film absorbs optical emissions (222) from the porous-Si layer (230). Circuitry (228, 244, and 238) associated with the apparatus (242 and 226) activate the porous-Si layer (230) to produce the optical emissions (222). The porous-Si layer (230) may be formed electrically, by chemical vapor deposition, or by anodizing crystalline silicon.
摘要:
An alcohol having an alpha hydrogen with the remaining groupings attached to the carbon atom being either hydrogen or an alkyl group having from 1 to 5 carbon atoms, preferably isopropanol, is added to the flow stream of a copper chelate gas, preferably a copper diketonate, the copper diketonate preferably being Cu(hfac).sub.2 or a composition identical thereto wherein one or more of the fluorine atoms is replaced by one of hydrogen atoms, and alkyl group having from one to five carbon atoms and a gas, preferably a reducing agent, preferably hydrogen. As a second embodiment, some or all of the copper can be replaced by aluminum to provide either Al(hfac).sub.3 or a combination of Cu(hfac).sub.2 and Al(hfac).sub.3. While the flow rates of each of the components is not critical and will vary with materials used and conditions, a flow rate for the reducing agent of from about 15 to about 60 SCCM and preferably 20 SCCM is appropriate with the amount of alcohol and metal chelate entering the flow stream being determined by the vapor pressure of the material involved. The flow stream enters as standard CVD reactor wherein the sample to be coated with copper is heated, thereby causing the copper to be deposited only on the heated area. The other reaction products are gaseous and are removed from the reactor by means of a pump or the like as is well known.
摘要:
The present invention provides a method of operating a one-time programmable read only memory (OTPROM). The OTPROM includes at least a select transistor, an electrode and a dielectric layer disposed on a substrate, wherein the electrode is set up on the source region of the select transistor and the dielectric layer is set up between the electrode and the source region. The method of operating the one-time programmable read only memory includes performing a programming operation to write a digital data value of ‘1’ into the memory and performing a programming operation to write a digital data value of ‘0’ into the memory.
摘要:
A non-volatile memory having a plurality of memory units each including a select unit and a memory unit is provided. The select unit is disposed on the substrate. The memory cell is disposed on one sidewall of the select unit and the substrate. The select unit includes a gate disposed on the substrate and a first gate dielectric layer disposed between the gate and the substrate. The memory cell includes a pair of floating gate disposed on the substrate, a control gate disposed on the upper surface of the floating gates, an inter-gate dielectric layer disposed between the floating gate and the control gate, a tunneling dielectric layer disposed between the floating gate and the substrate and a second gate dielectric layer disposed between the bottom of the control gate and the substrate.