Abstract:
An integrated circuit comprises a substrate (10) consisting of a material having substantially the same thermal-expansion coefficient as that of silicon, metal film (36) formed in a through hole (32) in the substrate (10) and projecting beyond the surface of the substrate, and a feedthrough electrode (38) of solder formed in the through hole (32) with the metal film (36) deposited. A number of such substrates can be laminated to provide a highly integrated reliable circuit board and integrated circuit with such a circuit board.
Abstract:
A process for the preparation of an anisotropic conducting material, which process comprises the steps of: (i) providing a strip or sheet (10) of a non-conducting matrix and laminating to each side thereof at least one layer of a release material (11, 12) in order to form a composite matrix (13); (ii) forming an array of holes (14) in a predetermined pattern in the composite matrix (13) from step (i); (iii) passing the matrix (13) from step (ii) through a coating head (1) which simultaneously fills the holes (14) of the array in the composite matrix (13) from both sides of the said matrix (13) with a conducting material (15); (iv) curing or drying the composite filled matrix from step (iii); and (v) removing at least one layer of release material (11, 12) from each side of the matrix.
Abstract:
A heat sink assembly includes a printed wiring board (20), a metal case (18) and a circuit package (10) containing a gallium arsenide field effect transistor heat dissipating circuit. The circuit package includes a metal slug (14) formed integrally with the circuit package, the heat dissipating circuit being bonded to an obverse surface of the metal slug. The printed wiring board includes first and second metal lands (22), the first metal land being disposed on an obverse surface of the printed wiring board, the second metal land being disposed on a reverse surface of the printed wiring board. A solder film is formed bonded to and thermally coupling a reverse surface of the metal slug to the first metal land, and a plurality of solder posts are formed, each post bonding to and thermally coupling the first metal land to the second metal land. The metal case is squeezed therebetween. At least one bolt (56) extends through a hole in the printed wiring board and into the metal case so as to squeeze together the metal case, the printed wiring board, the first and second metal lands and the grease film.
Abstract in simplified Chinese:根据本发明之一具体实施例,用于密封一或多个通孔之方法包含提供具有通孔之第一基材;在该等通孔之内部表面上形成一黏附层;在该第一基材及第二基材之间夹住一焊料层;及将该第一基材、第二基材、及焊料层升高至一在该焊料层的共晶点之上及熔点之下的温度。将该焊料层升高至一在该共晶点之上及该熔点之下的温度之动作造成该焊料层以大致上一致之方式流入该等通孔。
Abstract:
To provide a method for producing a semiconductor substrate able to uniformly and quickly fill through-holes in the semiconductor substrate with conductive material. This method comprises a process for forming through-holes (14) in a substrate (10), a process for disposing solder (42) on one surface of the substrate, and a process for pressing the solder on a side of the substrate by a press (40) and heat-melting the solder to fill the through-holes in the substrate with the solder.
Abstract:
PROBLEM TO BE SOLVED: To secure desired soldering strength in an electronic component to be packaged, and to improve heat radiation properties. SOLUTION: On the surface layer of a printed circuit board 14 composed of a copper foil pattern 22 formed of first to sixth layers 14a-14f, there is an inner via 30 extended along a lamination direction and formed while the inner via does not pass through the inner layer of the printed circuit board 14. In the inner layer of the printed circuit board 14, there is a core via 32 extended along a lamination direction and formed while the core via does not pass through the surface layer of the printed circuit board 14. The inner and core vias 30, 32 are offset at a prescribed space along the copper foil pattern 22 formed on the lamination surface for arrangement. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a laminated wiring board where the flip chip of an integrated circuit chip can easily be mounted, and a distance from a resistor and a capacitor from the integrated circuit chip can be shortened, and to provide a manufacturing method of the board. SOLUTION: Via holes 20 and 141 to 143, through which the bump electrode 30 of the integrated circuit chip can be inserted are formed at a pitch that is the same as that of the bump electrode 30. Metal films 22 and 23 formed inside the via holes 20 and 141 to 143 and 162 are electrically connected to circuit layers 11, 12, 26 and 27. The built-in capacitor 32 is formed by the prescribed region 101 of a core insulating layer 10 and prescribed regions 112 and 126 of inner circuit layers 11 and 12, which sandwich the region 101 and face each other. The built-in resistor 13 is formed in the inner circuit layer 12. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a soldering material realizing soldering joint for an electronic equipment by the new solder joint, in particular solder joint on the high temperature side in temperature hierarchical joint. SOLUTION: After the solder joint part of a semiconductor device and a board are soldered, a compound 3 containing Sn, etc., is formed around a ball 1 of metals such as Cu, Al, Au and Ag or a metal alloy, the metal ball 1 is connected by the compound 3. The brazing filler metal is provided by the paste containing a mixture of the ball 1 of the metal such as Cu, Al, Au, and Ag or the metal alloy and a metal ball 2 of Sn or In.