摘要:
An ultrahigh-frequency electronic component has an ultrahigh-frequency chip encased in a molded-resin package. The ultrahigh-frequency electronic component includes a first sealing layer encasing the ultrahigh-frequency chip therein and a second sealing layer encasing the first sealing layer therein. The first sealing layer contains a number of voids or minute air bubbles therein which are effective in reducing the permittivity of the first sealing layer. A method of manufacturing the ultrahigh-frequency electronic component is also disclosed.
摘要:
A hollow package manufacturing method includes the adhesive spreading step, the adhesive applying step, and the cap adhering step. In the adhesive spreading step, an adhesive is spread on a circular table to a uniform thickness. In the adhesive applying step, an open end face of a cylindrical cap having a bottom is urged against the circular table to apply the adhesive to the cap. In the cap adhering step, the cap applied with the adhesive is adhered to a case. A hollow package manufacturing apparatus is also disclosed.
摘要:
An ultrahigh-frequency electronic component has an ultrahigh-frequency chip encased in a molded-resin package. The ultrahigh-frequency electronic component includes a first sealing layer encasing the ultrahigh-frequency chip therein and a second sealing layer encasing the first sealing layer therein. The first sealing layer contains a number of voids or minute air bubbles therein which are effective in reducing the permittivity of the first sealing layer. A method of manufacturing the ultrahigh-frequency electronic component is also disclosed.
摘要:
An electronic component includes a substrate portion, a bank portion, a plurality of lead members, an anchor hole, and at least a pair of notches. A chip is supported on the substrate portion. The bank portion is formed on a periphery of the substrate portion to surround the chip. The plurality of lead members are made of conductive strip pieces, and each lead member has an inner lead electrically connected to the chip and an outer lead extending to an outside. The substrate portion and the bank portion are integrally molded with a resin to include the lead members, so that the inner and outer leads are fixed to a connecting portion between the substrate portion and the bank portion. The anchor hole is formed in a portion where each of the lead members is in contact with the bank portion, and is filled with a resin. The pair of notches are formed in two ends of each of the lead members to sandwich the anchor hole.
摘要:
In a lead frame flash removing method and apparatus, a lead frame is molded integrally with a case. After molding, abrasive agent-mixed water is sprayed to a surface of the lead frame where a flash is formed. The lead frame is dipped in an electrolytic solution and applying a DC voltage is applied across the lead frame and an electrode in the electrolytic solution, thereby electrolytically processing the lead frame. After the electrolytic process, an external force is applied to the surface of the lead frame, thereby removing the flash.
摘要:
A package of the present invention comprises a base molded integrally with a lead frame by resin, a chip mounted on the lead frame, and a cap made of resin, which covers the chip and is fixed to the base. The base includes a substrate portion sealing the lead frame therein, a frame-shaped bank portion formed at a periphery of an upper surface of said substrate portion, the bank portion having said lead frame interposed between it snd the substrate portion, and an anchor portion formed at a portion of the lead frame interposed between the substrate portion and the bank portion. The chip is mounted on a region of the lead frame surrounded by the bank portion. The cap is fixed to the bank portion.
摘要:
A method of producing a semiconductor device of the present invention is applicable to a multilayer wafer for leadless chip carrier packages and breaks it on a package basis. The method begins with a step of forming a generally V-shaped groove in one major surfaces of the wafer in the direction of thickness of the wafer. A weak, cleaving portion is formed in the other major surface of the wafer in alignment with the groove. A cleaving force is exerted on the wafer to thereby form a break in the cleaving portion, so that the wafer is caused to break from the groove toward the cleaving portion in the direction of thickness of the wafer. The cleaving portion may be replaced with a strong, non-cleaving portion, in which case the break is formed in the interface between the non-cleaving portion and the wafer due to a difference in cleaving force.
摘要:
It is an objective to provide a semiconductor device with low leak current. The semiconductor device includes a plurality of ground side electrodes and a plurality of signal side electrodes arranged on a semiconductor substrate in an alternating manner; a plurality of control electrodes arranged respectively between each pair of a ground side electrode and a signal side electrode; a ground side electrode connecting section that connects the ground side electrodes to each other; a signal side electrode connecting section that connects the signal side electrodes to each other; and ground side lead wiring and signal side lead wiring that extend respectively from a region near one end and a region near another end of an arranged electrode section, in which the ground side electrodes and the signal side electrodes are arranged in an arrangement direction, away from the arranged electrode group in the arrangement direction.
摘要:
A disk unit includes a loading portion that accommodates a recording medium, a main body unit that contains the loading portion, a cover rotatably attached to the main body unit and capable of moving between a closed position that covers the loading portion and a plurality of open positions that exposes the loading portion, a retaining member provided on the main body unit for retaining the cover in the closed position, a member for manually moving the retaining member to a release position at which the cover is released from retention in the closed position, a drive member activated in response to an eject signal, and a drive transmission mechanism that transmits a drive force of the drive member to the retaining member so as to move the retaining member to the release position.
摘要:
According to the present invention, there is provided a blood pressure-lowering agent, a vascular flexibility-ameliorating agent and foods having these functions imparted thereto, which are comprising isohumulones or a hop extract and/or an isomerized hop extract as an active ingredient.