摘要:
A surface acoustic wave device, wherein comb electrodes (2) and reflector electrodes (3) are surrounded by a plurality of auxiliary electrodes (6a, 6b) electrically independent of each other and having different widths according to the positions thereof, whereby a charge generated by the pyroelectricity of a substrate (1) with a piezoelectricity can be electrically uniformized efficiently.
摘要:
The present invention provides an improved semiconductor flipchip package that includes a central cavity area on the first major side for receiving a flipchip die therein. The package substrate is substantially made from a single material that serves as the support and stiffener and provides within the cavity floor all the connecting points for flipchip interconnection to the silicon die. The integral cavity wall serves as a stiffener member of the package and provides the required mechanical stability of the whole arrangement without the need for a separate stiffener material to be adhesively attached. The cavity walls may contain extra routing metallization to create bypass capacitors to enhance electrical performance. The invention discloses optional methods to cover the silicon die to enhance thermal performance of the package.
摘要:
To accommodate high power densities associated with high performance integrated circuits, an integrated circuit package includes a heat-dissipating structure in which heat is dissipated from a surface of one or more dice (40) to an integrated heat spreader (IHS) through a high capacity thermal (110) interface formed of diamond, a diamond composite, or graphite. In one embodiment, a diamond layer is grown on the IHS (122). In another embodiment, a diamond layer is separately formed and affixed to the IHS. Methods of fabrication, as well as application of the package to an electronic assembly and to an electronic system, are also described.
摘要:
A method for hermetic sealing of electronic parts which involves the step of joining a base having a semiconductor element placed thereon and a cap via a solder, wherein the solder comprises Au in an amount of 78 wt % to 79.5 wt % and Sn in the residual amount. It is preferred that the cap is plated with cold and use is made of a solder comprising Au in an amount of 78 wt % to 79 wt % and Sn in the residual amount.
摘要:
A heat spreader, comprised of a plurality of carbon fibers oriented in a plurality of directions, with a carbon or metal matrix material dispersed about the fibers, is described. The carbon fibers facilitate the spreading of heat away from the smaller semiconductor device and up to a larger heat removal device, such as a heat sink.
摘要:
A thick film millimeter wave transceiver module includes a base plate and a multi-layer substrate board having a plurality of layers of low temperature transfer tape received on the base plate. The different layers can vary. They can include a DC signals layer having signal tracks in connection; a ground layer having ground connections; a device layer having capacitors and resistors embedded therein; and a top layer having cut-outs for receiving MMIC chips therein. A solder preform layer is located between the device layer and the top layer for securing any MMIC chips. A channelization plate is received over the multi-layer substrate board and a channel is formed to receive MMIC chips and provide isolation between transmit and receive signals.
摘要:
First to third dielectric layers (201-203) are deposited to form a multilayered dielectric substrate (220). A plurality of conductor patches (204a-204d) are formed on the surface of the first dielectric layer (201). An antenna-feeding microstrip line (205) is formed between the first and second dielectric layers. A ground layer (206) is formed between the second and third dielectric layers (202, 203). Microstrip lines (208a, 208b) for high-frequency circuits are formed on the back of the third dielectric layer (203). The ground layer (206) has a slot (207) though which the antenna-feeding microstrip line (205) and the high-frequency microstrip line (208a) are coupled electromagnetically. Thus, the efficiency and directivity of an antenna are improved.
摘要:
The invention concerns a method for making an optical semiconductor housing and an optical semiconductor housing, wherein the front face of a first semiconductor component (4) such as microprocessor is fixed on a rear face of an electrical connection support plate (30), first electrical connection means (7) connect said first component to said support plate, the rear face of a second semiconductor component (19) is borne by said support plate, its front face comprising an optical sensor (21), second electrical connection means (22) connect said optical component to said support plate, said first component (4) is encapsulated in a coating block (15), an encapsulating wall projecting (17) on the front face of said support plate defines a cavity (18) at the bottom of which is arranged said optical component (19), a cover is fixed on the front end of said projecting wall and at least partly transparent, and external electrical connection means (28) arranged on an exposed part of said support plate.
摘要:
The invention relates to a solid-state imaging device (1) which is encapsulated in a ceramic package covered by a transparent window (6) comprising a phosphorus-containing glass. The window is provided with a coating (8), for example of chromium, at the circumference of the window to counteract degradation of the joint between the window and the ceramic package, which degradation results from the sensitivity of phosphorus glass to moisture. The use of phosphorus glass has the advantage that it is opaque to infrared radiation, so that the application of a separate coating serving as an IR filter is avoided and hence the dependence of the sensitivity of the imaging device on the angle of incidence of the radiation to be detected.
摘要:
An electronic device comprises a case with steps on its inner wall, in which components are accurately mounted in place. A package (13) has an inner wall with steps (26), on which inner connection electrodes (14) are formed. The bottom of the package (13) is provided with a shield electrode (15), on which a component (17) is fixed with an adhesive layer (16). The component (17) and the inner connection electrodes (14) are connected through wires (19) electrically. Any of the component (17) and the wire (19) is positioned and fixed a predetermined position with respect to areas (18a, 18b) on the bottom of the package (13) where no electrode exists.