摘要:
There are disclosed a solder bump forming method and an apparatus therefor, which achieve a high reliability, and an electronic part, produced by this method and this apparatus, is also disclosed. For each of the step of arraying solder balls, the step of supplying a flux, and the step of mounting the solder balls on a board, it is checked whether or not any solder ball is omitted, and the process is conducted while confirming the condition of the operation, thereby enhancing the reliability and also preventing defective products from being produced.
摘要:
The present invention provides a trackball and an in-vehicle device controller using the trackball. The trackball provides a stable operational feel and is easy to operate even in an environment in a vehicle where vibration and movement are present. The trackball includes a ball made of a non-magnetic material and having embedded therein bar members made of a magnetic material and arranged on three axes orthogonal to one another, a case enclosing the ball such that at least an upper portion of the ball is exposed, magnetic members fixed to the case on two axes penetrating through the center of the ball and orthogonal to each other so as to allow magnetic coupling to ends of the bar members, and another magnetic member fixed to the case on an axis penetrating through the center of the ball and orthogonal to the two axes so as to allow magnetic coupling to an end of one of the bar members.
摘要:
A semiconductor plastic package, more particularly a preferred package structure and method for making a BGA package. A resin sealed BGA package where a supporting frame which fixedly supports semiconductor parts; i.e., an IC chip, a circuit board, or a circuit film, is sealed with resin, using a mold which is composed of an upper mold half and a lower mold half with the lower mold half having a plurality of projections, one at a position corresponding to each of the external terminals. The mold has a divisional structure which has an air vent between the divisional elements thereof.
摘要:
A tape carrier package has a base film and leads formed on one side of the base film. The base film defines a device hole therein, while the leads have outer portions to be bonded to a substrate and inner lead portions extending into the device hole. The tape carrier package can be mounted on a substrate by applying a high-frequency electromagnetic field to a portion of each lead which is to be bonded to the substrate, whereby solder applied to the lead or substrate in advance is heated and melted to bond the package to the substrate.
摘要:
In order to reduce a strain, developing in solder bumps in a BGA-type semiconductor device-mounting construction, so as to enhance a thermal fatigue life, voids, present in each solder bump joint portion of a BGA-type semiconductor device, are limited to a predetermined size, and a void of a large size, which would increase a strain to be produced, is eliminated.
摘要:
There is a trend to increase that area of a device requiring a memory of large capacity, which is occupied by a semiconductor memory. This trend obstructs reduction of the size of the device. The present invention contemplates to provide a memory which can have a high integration, a high density and a large capacity while minimizing the mounting area. In order to achieve this memory, the TAB (Tape Automated Bonding) of the prior art is mounted on an electrically conductive connector, and a plurality of structures composed of the TAB and the connector are stacked. Moreover, the connector mounting the TAB thereon is constructed such that the independent terminals of the stacked TABs may not be shorted.
摘要:
A semiconductor plastic package, more particularly a preferred package structure and method for making a BGA package. A resin sealed BGA package where a supporting frame which fixedly supports semiconductor parts; i.e., an IC chip, a circuit board, or a circuit film, is sealed with resin, using a mold, which is composed of an upper mold half and a lower mold half with the lower mold half having a plurality of projections, one at a position corresponding to each of the external terminals. The mold has a divisional structure which has an air vent between the divisional elements thereof.
摘要:
There is a trend to increase that area of a device requiring a memory of large capacity, which is occupied by a semiconductor memory. This trend obstructs reduction of the size of the device. The present invention contemplates to provide a memory which can have a high integration, a high density and a large capacity while minimizing the mounting area. In order to achieve this memory, the TAB (Tape Automated Bonding) of the prior art is mounted on an electrically conductive connector, and a plurality of structures composed of the TAB and the connector are stacked. Moreover, the connector mounting the TAB thereon is constructed such that the independent terminals of the stacked TABs may not be shorted.
摘要:
A semiconductor apparatus comprises a heat diffusing plate and a surface installing printed board. A semiconductor device of a high heat generation is installed on the heat diffusing plate. A surface installing package and chip parts are installed on both surfaces of the printed board. A through hole is formed at the center of the printed board so that the semiconductor device is located at the center. The heat diffusing plate on which the semiconductor device has been installed and the surface installing printed board are connected and integrated.
摘要:
A semiconductor plastic package, more particularly a preferred package structure and method for making a BGA package. A resin sealed BGA package where a supporting frame which fixedly supports semiconductor parts; i.e., an IC chip, a circuit board, or a circuit film, is sealed with resin, using a mold which is composed of an upper mold half and a lower mold half with the lower mold half having a plurality of projections, one at a position corresponding to each of the external terminals. The mold has a divisional structure which has an air vent between the divisional elements thereof.