Abstract:
A very small computer memory card is densely packed with a large number of flash EEPROM integrated circuit chips. A computer memory system provides for the ability to removably connect one or more of such cards with a common controller circuit that interfaces between the memory cards and a standard computer system bus. Alternately, each card can be provided with the necessary controller circuitry and thus is connectable directly to the computer system bus. An electronic system is described for a memory system and its controller within a single memory card. In a preferred physical arrangement, the cards utilize a main circuit board with a plurality of sub-boards attached thereto on both sides, each sub-board carrying several integrated circuit chips.
Abstract:
A very small computer memory card is densely packed with a large number of flash EEPROM integrated circuit chips. A computer memory system provides for the ability to removably connect one or more of such cards with a common controller circuit that interfaces between the memory cards and a standard computer system bus. Alternately, each card can be provided with the necessary controller circuitry and thus is connectable directly to the computer system bus. An electronic system is described for a memory system and its controller within a single memory card. In a preferred physical arrangement, the cards utilize a main circuit board with a plurality of sub-boards attached thereto on both sides, each sub-board carrying several integrated circuit chips.
Abstract:
A very small computer memory card is densely packed with a large number of flash EEPROM integrated circuit chips. A computer memory system provides for the ability to removably connect one or more of such cards with a common controller circuit that interfaces between the memory cards and a standard computer system bus. Alternately, each card can be provided with the necessary controller circuitry and thus is connectable directly to the computer system bus. An electronic system is described for a memory system and its controller within a single memory card. In a preferred physical arrangement, the cards utilize a main circuit board with a plurality of sub-boards attached thereto on both sides, each sub-board carrying several integrated circuit chips.
Abstract:
To realize low-profile electronic apparatus (a memory module and a memory card) of a large storage size by mounting tape carrier packages (TCPs) with a memory chip encapsulated onto a wiring board in high density. To be more specific, a TCP is composed of an insulating tape, leads formed on one side thereof, a potting resin with a semiconductor chip encapsulated, and a pair of support leads arranged on two opposite short sides. The pair of support leads function to hold the TCP at a constant tilt angle relative to the mounting surface of the wiring board. By varying the length vertical to the mounting surface, the TCP can be mounted to a desired tilt angle.
Abstract:
A very small computer memory card is densely packed with a large number of flash EEPROM integrated circuit chips. A computer memory system provides for the ability to removably connect one or more of such cards with a common controller circuit that interfaces between the memory cards and a standard computer system bus. Alternately, each card can be provided with the necessary controller circuitry and thus is connectable directly to the computer system bus. An electronic system is described for a memory system and its controller within a single memory card. In a preferred physical arrangement, the cards utilize a main circuit board with a plurality of sub-boards attached thereto on both sides, each sub-board carrying several integrated circuit chips.
Abstract:
According to the present invention, a fixing method by soldering is provided which attains, upon fixing to a substrate a cylindrical optical part which includes a lens, a photo-semiconductor device having a light emitting portion or a light receiving portion located substantially at a focus position of the lens, and terminals connected to the photo-semiconductor device, mechanical fixation of the cylindrical optical part to the substrate and electric connection of the terminals to the substrate at a time. According to another aspect of the present invention, a method of collectively fixing an optical part and an electric part on a substrate by soldering is provided. A heating block is divided into a portion made of a substance having a high coefficient of thermal conductivity and another portion made of another substance having a low coefficient of thermal conductivity. The portion made of the substance having a high coefficient of thermal conductivity is contacted with a reverse face of a portion of a substrate at which an optical part is mounted while the portion made of the substance having a low coefficient of thermal conductivity is contacted with the reverse face of another portion of the substrate at which an electric part is mounted.
Abstract:
An optical communication apparatus which comprises a printed circuit board, plural circuit elements fixed to the printed circuit board, the circuit elements having terminals extended to the printed circuit board, a photosensitive glass base fixed to the printed circuit board, various optical components accurately fixed to the glass base, the optical elements respectively having plural leads, and corresponding conductive members for electrically connecting the terminals of the circuit elements and the corresponding leads of the optical components, the conductive members each having a rigidity smaller than the rigidity of the corresponding leads of the optical components.
Abstract:
This invention relates to a right angle light emitting diode assembly with snap-in feature wherein an insulating body, generally in the shape of a rectangular parallelepiped, no larger than a finger nail, holds a light emitting diode in the insulating body at right angles to the surface of a printed wiring board, the insulating body being shaped such that robotic equipment can be used to insert the diode assembly cheaply and efficiently onto said board. The insulating body has front and back generally parallel surfaces, top and bottom generally parallel surfaces, and first and second generally parallel side surfaces, the respective surfaces having grooves and protuberances to allow the light emitting diode (LED) to be fixedly mounted in said body and the body to be inserted into a printed wiring board which can then be wave soldered without deleterious effects on the LED or supporting body. The bottom of the body has two oppositely faced snap-in proturbances which pass through the hole on a printed wiring board which deform inwardly slightly while passing through the hole and expand outwardly after extending out from beyond the hole to fixedly mount the diode assembly in the correct position on the board.
Abstract:
A one-step water soluble (WS) flux process may reduce residue staining and increase yields for bond grid array (BGA) packages. In one example, the WS flux may use increased amounts of bonding polymer (BP) and reduced amounts of amine to increase viscosity. The increased viscosity may eliminate using a second no-clean flux and enable a single WS flux to both clean the associated substrate and provide stable solder ball support during reflow.
Abstract:
Probe includes a transducer, a PCB having a pattern part contacting the transducer via face-to-face contact, and a bonding member bonding the transducer to the pattern part of the PCB. The bonding part of the PCB is provided with the pattern part to increase a bonding area of the bonding part and to allow the bonding member to contact not only a metal layer of the bonding part but also an electrical insulation part thereof, thereby improving a bonding force between the transducer and the PCB. As a result, the transducer can be reliably bonded to the PCB, so that performance of the transducer can be prevented from being deteriorated due to defective connection between the PCB and the transducer.