Abstract:
To realize low-profile electronic apparatus (a memory module and a memory card) of a large storage size by mounting tape carrier packages (TCPs) with a memory chip encapsulated onto a wiring board in high density. To be more specific, a TCP is composed of an insulating tape, leads formed on one side thereof, a potting resin with a semiconductor chip encapsulated, and a pair of support leads arranged on two opposite short sides. The pair of support leads function to hold the TCP at a constant tilt angle relative to the mounting surface of the wiring board. By varying the length vertical to the mounting surface, the TCP can be mounted to a desired tilt angle.
Abstract:
Bonding pads are formed on a main surface of a semiconductor chip. An insulating layer having openings located on the bonding pads is formed on the main surface of the semiconductor chip. Base metal layers are formed on the bonding pads. A buffer coat film having a portion laid on a periphery of the base metal layer is formed on the insulating layer. Connection layers are formed on the base metal layers. First conductors are formed on the connection layers. A seal resin exposing only top surfaces of the first conductors is formed. Lumpish second conductors are formed on the top surfaces of the first conductor. Thereby, a resin seal semiconductor package can be made compact and it has improved electrical characteristics and high reliability.
Abstract:
A very small computer memory card is densely packed with a large number of flash EEPROM integrated circuit chips. A computer memory system provides for the ability to removably connect one or more of such cards with a common controller circuit that interfaces between the memory cards and a standard computer system bus. Alternately, each card can be provided with the necessary controller circuitry and thus is connectable directly to the computer system bus. An electronic system is described for a memory system and its controller within a single memory card. In a preferred physical arrangement, the cards utilize a main circuit board with a plurality of sub-boards attached thereto on both sides, each sub-board carrying several integrated circuit chips.
Abstract:
An assembly of parts forming an angle between facing surfaces of the parts and a process for producing an assembly is described. The parts (2, 4) are provided with contact elements or pads (6, 8, 10, 12) for connection to one another by means of a relatively low melting point metallic soldering material. The surface of each of the pads is wettable by the low melting point metallic material in the molten state, while areas surrounding the pads are not wettable. The contact pads of one of the parts are covered with flat coils or wafers (10, 12) of the low melting point metallic material. The wafers have the same thickness, but different volumes. The contact pads of the other part are placed on the corresponding wafers. The wafers' thickness, volumes, and spacing are chosen so that when the wafers are heated to the molten state and form truncated spherical drops due to surface tension, the parts form between them a predetermined angle. The invention has particular application to the manufacture of mirrors.
Abstract:
A semiconductor package is provided in which the semiconductor element is bonded to a slab of metal and is encapsulated in a body of insulating epoxy. Lead terminals are connected to the semiconductor element within the body and extend out from one end of the body. The metal slab extends out from the body from the same end as the lead terminals and in a plane which is parallel to that of the terminals, thereby forming a heat sink tab for the device. The package may be rigidly mounted on a printed circuit board by inserting the lead terminals and the heat sink tab into respective holes in a printed circuit board and soldering the terminals and tab to copper foil on the board. The solder connection of the heat sink tab to the copper foil provides an excellent thermal contact between the tab and the foil, in addition to providing a rigid support for the device.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of soldering an electronic component improving the wettability of solder while suppressing the residual quantity of voids, and to provide the electronic component. SOLUTION: In the method for soldering the electronic component, the upper parts of board electrodes 36a to 36c for a printed-circuit board 30 are supplied with solder 56a to 56c. In the method for soldering the electronic component, the electronic component 10 is loaded on the printed-circuit board 30 under the state supporting one side by a solder chip 70 having a melting property by a heat and directly supporting an opposed one side to the one side to the printed-circuit board 30 in the electronic component 10 between the board electrodes 36a to 36c and component electrodes 16a to 16c of the electronic component 10 mounted on the board electrodes 36a to 36c, and solder 56a to 56c and the solder chip 70 are heated. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid jet head improving electrical and mechanical adhesion force between a wiring board and an electrode and reducing cost, and a liquid jet apparatus and an actuator device. SOLUTION: The liquid jet head includes a passage-forming member 22 provided with a pressure generating chamber communicating with a nozzle opening for jetting liquid; a piezoelectric element provided on one face side of the passage-forming member 22 to cause pressure change in the pressure generating chamber; a terminal part 46 provided on the one face side of the passage forming member and conductive to the piezoelectric element; the wiring board 50 provided with a wiring layer 51 supplying a driving signal for driving the piezoelectric element; and an adhesive layer 55 formed of an anisotropic conductive material to make the wiring layer 51 and the terminal part 46 conductive to each other and to join the passage-forming member 22 to the wiring board 50. At least one of the faces of the passage-forming member 22 and wiring board 50 in an area provided with the adhesive layer 55 includes a gap layer 56 that is electrically discontinuous with the terminal part 46 and the wiring layer 51. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an electronic circuit including a capacitor for cutting a DC component capable of cutting the DC component while suppressing deterioration of frequency characteristics over a wide band, and to provide its manufacturing method. SOLUTION: The electronic circuit includes a first capacitor 60 for cutting the DC component of a low frequency band when a frequency band is two-divided into the low frequency band and a high frequency band, and a plurality of second capacitors 20 and 30 provided for each of narrow bands for cutting the DC component of each narrow band when the high frequency band is further divided into the narrow bands. The first capacitor 60 and the plurality of second capacitors 20 and 30 are connected respectively in parallel. COPYRIGHT: (C)2006,JPO&NCIPI