摘要:
A process for making a chip sized semiconductor device, in which a semiconductor chip is prepared so as to have electrodes on one of surfaces thereof and an electrically insulating passivation film formed on the one surface except for areas where the electrodes exist. An insulation sheet is prepared so as to have first and second surfaces and a metallic film coated on the first surface. The second surface of the insulation sheet is adhered on the one surface of the semiconductor chip. First via-holes are provided in the metallic film at positions corresponding to the electrodes. Second via-holes are provided in the insulation sheet at positions corresponding to the first via-holes so that the electrodes are exposed. The metallic film is electrically connected to the electrodes of the semiconductor chip through the first and second via-holes. A circuit pattern is formed from the metallic film so that the circuit pattern has external terminal connecting portions. An insulation film is adhered on the insulation sheet so that the external terminal connecting portions are exposed. External connecting terminals are electrically connected to the external terminal connecting portions of the circuit pattern.
摘要:
A process for making a chip sized semiconductor device, in which a semiconductor chip is prepared so as to have electrodes on one of surfaces thereof and an electrically insulating passivation film formed on the one surface except for areas where the electrodes exist. An insulation sheet is prepared so as to have first and second surfaces and a metallic film coated on the first surface. The second surface of the insulation sheet is adhered on the one surface of the semiconductor chip. First via-holes are provided in the metallic film at positions corresponding to the electrodes. Second via-holes are provided in the insulation sheet at positions corresponding to the first via-holes so that the electrodes are exposed. The metallic film is electrically connected to the electrodes of the semiconductor chip through the first and second via-holes. A circuit pattern is formed from the metallic film so that the circuit pattern has external terminal connecting portions. An insulation film is adhered on the insulation sheet so that the external terminal connecting portions are exposed. External connecting terminals are electrically connected to the external terminal connecting portions of the circuit pattern.
摘要:
A semiconductor device includes a semiconductor element having first and second surfaces. The element has connecting terminals on the first surface. A substrate has a substrate surface on which external connecting terminals and conductive patterns are formed. The connecting terminals of the semiconductor element are electrically connected to the external connecting terminals by means of the conductive patterns. The connecting terminals of the semiconductor element are each connected to one end of respective ones of the conductive patterns of the substrate by a flip-chip bonding. Resin hermetically seals the connecting terminals of the semiconductor element, so that the second surface of the semiconductor element is not covered by the sealing resin. A mounting substrate has a surface provided with circuit patterns. The semiconductor device is mounted on the mounting substrate in such a manner that the external connecting terminals are electrically connected to the circuit patterns of the mounting substrate and the second surface of the semiconductor element comes into contact with the surface of the mounting substrate.
摘要:
A method of producing a chip embedded substrate is disclosed. This method comprises a first step of mounting a semiconductor chip on a first substrate on which a first wiring is formed; and a second step of joining the first substrate with a second substrate on which a second wiring is formed. In the second step, the semiconductor chip is encapsulated between the first substrate and the second substrate and electrical connection is made between the first wiring and the second wiring so as to form multilayered wirings connected to the semiconductor chip.
摘要:
Antipsychotics and ischemic cerebral disease therapeutics comprising as an effective ingredient a compound represented by the following formula (1) or (2): ##STR1## or a salt thereof. These drugs do not induce extrapyramidal side effects.
摘要:
A disc drive control device maintains power to its circuits after a manual power source switch is opened for a time sufficient to assure that the read/write head of a hard disc drive is moved to its shipping zone. This is accomplished with a bypass device for maintaining power to the hard disc drive until the head is properly stowed in its shipping position after the operator turns off the power switch. Further, a detecting circuit prevents the disc drive from hanging up when the operator turns power on again before the head movement is completed. A timer turns off the power bypass device a short time after the power source switch is turned off, if, for any reason, the power bypass fails to be shut down as a normal result of the completed movement of the read/write head to the shipping position.
摘要:
This invention relates to pyridazinone derivatives of the general formula: ##STR1## [wherein R.sup.1 stands for a hydrogen atom or a lower alkyl group; R.sup.2 for a hydrogen atom or a lower alkyl group; and A for (i) a ring selected from a benzene ring, a furan ring, a thiophene ring and a pyridine ring (on which ring 1-3 substituents or atoms selected from amino groups, nitro groups, lower alkanoylamino groups, hydroxyl groups, lower alkanoyloxy groups, sulfamoyl groups and halogen atoms may be present), or (ii) a grouping of the formula: ##STR2## (wherein R.sup.3 stands for a hydrogen atom, a lower alkyl group, a phenyl(lower)alkyl, a hydroxyphenyl(lower)alkyl group, a lower alkylmercapto(lower)alkyl group, a benzylmercapto(lower)alkyl group, a guanidino(lower)alkyl group, a nitroguanidino(lower)alkyl group, an indolyl(lower)alkyl group, a carbamoyl(lower)alkyl group or a carboxy(lower)alkyl group, R.sup.4 for a hydrogen atom or a lower alkyl group, R.sup.5 for a hydrogen atom, a lower alkyl group, a lower alkanoyl group, a benzoyl or a benzyloxycarbonyl group, and R.sup.3 and R.sup.4 may be combined to form a grouping of the formula: ##STR3## which forms a ring), or (iii) a grouping of the formula: ##STR4## (wherein R.sup.6, R.sup.7 and R.sup.8 each stand for a hydrogen atom or a lower alkyl group, B is an oxygen atom or a sulfur atom, R.sup.9 stands for a hydrogen atom or a lower alkanoyl group, and n is 0 or 1)].
摘要:
A circuit substrate having a mounting surface on which a semiconductor chip is mounted and at least one connection pad formed on the mounting surface is connected to a support plate having at least one mounting portion with a diameter larger than a diameter of the connection pad, through a truncated-cone-shaped solder layer which is formed from at least one solder ball on the basis of a difference between the diameter of the mounting portion and the diameter of the connection pad.
摘要:
A wiring board includes an insulating layer in which a semiconductor chip is embedded, and a wiring structure connected to the semiconductor chip. A reinforcing member reinforcing the insulating layer is embedded in the insulating layer. This enables reduction in a thickness of the wiring board and a suppression of warpage of the wiring board.
摘要:
A pickup device comprises a flexible circuit member including a main circuit portion on which electric or electronic components are mounted and a sub-circuit portion connected to the main circuit portion. The pickup device further comprises a housing on which the flexible circuit member is mounted. Each of the main circuit portion and the sub-circuit portion has a single-sided structure and includes a ground portion. The sub-circuit portion is folded with respect to the main circuit portion. The flexible circuit member is mounted on the housing while the main circuit portion and the sub-circuit portion are held in an overlapping arrangement. With this arrangement, S/N ratio of electric signals can be improved while achieving cost reduction.