Abstract:
A method and apparatus for testing unpackaged semiconductor dice includes a mother board (10) and a plurality of interconnects (12) mounted on the mother board (10) and adapted to establish a temporary electrical connection with the dice (14). The interconnects (12) can be formed with a silicon substrate (20) and raised contact members (16) for contacting the bond pads (22) of a die (14). Alternately the interconnects (16) can be formed with micro bump contact members (16) mounted on an insulating film (74). The mother board (10) allows each die (14) to be tested separately for speed and functionality and to also be burn-in tested in parallel using standard burn-in ovens. In an alternate embodiment testing is performed using a mother board/daughter board arrangement. Each daughter board (82) includes interconnects (12) that allow the dice (14) to be tested individually for speed and functionality. Multiple daughter boards (82) can then be mounted to the mother board (10) for burn-in testing using standard burn-in ovens.
Abstract:
A multilayer printed wiring board 10 includes: a build-up layer 30 that is formed on a core substrate 20 and has a conductor pattern 32 disposed on an upper surface; a low elastic modulus layer 40 that is formed on the build-up layer 30; lands 52 that are disposed on an upper surface of the low elastic modulus layer 40 and connected via solder bumps 66 to a IC chip 70; and conductor posts 50 that pass through the low elastic modulus layer 40 and electrically connect lands 52 with conductor patterns 32. The conductor posts 50 have the aspect ratio Rasp (height/minimum diameter) of not less than 4 and the minimum diameter exceeding 30µm, and the aspect ratio Rasp of external conductor posts 50a, which are positioned at external portions of the low elastic modulus layer 40, is greater than or equal to the aspect ratio Rasp of internal conductor posts 50b, which are positioned at internal portions of the low elastic modulus layer 40.
Abstract:
A method and apparatus for testing unpackaged semiconductor dice includes a mother board (10) and a plurality of interconnects (12) mounted on the mother board (10) and adapted to establish a temporary electrical connection with the dice (14). The interconnects (12) can be formed with a silicon substrate (20) and raised contact members (16) for contacting the bond pads (22) of a die (14). Alternately the interconnects (16) can be formed with micro bump contact members (16) mounted on an insulating film (74). The mother board (10) allows each die (14) to be tested separately for speed and functionality and to also be burn-in tested in parallel using standard burn-in ovens. In an alternate embodiment testing is performed using a mother board/daughter board arrangement. Each daughter board (82) includes interconnects (12) that allow the dice (14) to be tested individually for speed and functionality. Multiple daughter boards (82) can then be mounted to the mother board (10) for burn-in testing using standard burn-in ovens.
Abstract:
A surface electrode is provided on a surface of a piezoelectric, element for changing the volume of each pressure chamber in an inkjet head. The surface electrode has a main electrode portion opposed to the pressure chamber and a connecting portion not opposed to the pressure chamber. A land is provided on one end of the connecting portion of the surface electrode. The land is electrically connected to the surface electrode. When the land is connected to a terminal of an FPC, a driving signal can be transmitted to the surface electrode. The land is therefore connected to the terminal using solder and a thermosetting resin covering the surface of the solder, or using only a thermosetting resin.
Abstract:
A wiring board that allows the high-density connection with a plurality of circuit boards within a limited area, a manufacturing method for the same and electronic equipment using the same are provided. A wiring board 100 includes: a plurality of conductive layers 1A to 1G each including one or more wirings for transmitting signals; and a plurality of insulation layers 2 for insulating the respective conductive layers 1A to 1G. The conductive layers 1A to 1G and the insulation layers 2 are laminated alternately, and each of the plurality of conductive layers 1A to 1G is provided with a terminal 1AT to 1GT at at least one of both ends. The terminals 1AT to 1GT are formed stepwise and separated by the insulation layers 2 in a cross-sectional shape of a lamination structure of the conductive layers 1A to 1G and the insulation layers 2.
Abstract:
A flexible printed wiring board (10) in which a metallic bump (1a) of a first flexible printed wiring part (1) is connected to a connection pad (2a) of a second flexible wiring part (2), wherein the first flexible printed wiring part (1) is composed of a conductive layer (4) and an insulating layer (5) adjacent to the conductive layer (4), a hole (A) reaching the conductive layer is made in the insulating layer (5), a metallic plug (6) is formed in the hole (A) by electroplating, and the end of the metallic plug (6) projecting from the insulating layer (5) serves as a metallic bump (1a). As many flexible printed wiring boards as possible are produced from a laminated sheet for a flexible printed wiring having a predetermined size.
Abstract:
An ink jet print head, a method of bonding a flexible printed circuit (FPC) (60) cable for an ink jet print head, and an apparatus adopting the method are provided. In this bonding method, the bonding portion of an FPC conductor (61) is heated being pressed down on a corresponding pad (20) formed on a substrate (10) for an ink jet print head. Then, at least two pads (20) are bonded at a time. In this bonding method, an electrical defect due to pad peel-off phenomenon, which is created by an conventional tape automated bonding (TAB) method in which the conductors of an FPC cable are bonded to the pads on a substrate in a manner where one conductor is bonded to a pad at a time, is removed to increase the reliability of bonding. In addition, the bonding of a plurality of pads (20) at a time leads to a reduction in the time required for bonding.