摘要:
A memory card wherein a substrate is affixed to a cap is formed without the projection of substrate edges from a back surface of the cap. The memory card includes a substrate having a sealing member bonded to a recess in the cap. By utilizing a difference in thermal expansion coefficient between the sealing member and the substrate, the substrate is warped so that its central portion projects away from the cap. The shallow recess is deeper than the sum of the thickness of the substrate and the thickness of an adhesive for bonding the substrate to the bottom of the shallow recess, whereby peripheral edges of the substrate retract into the shallow recess without projecting from the back surface of the cap. The cap is shaped as a card several millimeters thick. A memory chip and control chip are incorporated in the sealing member.
摘要:
Semiconductor chips (4), (5) are bonded and fixed to each other in a state where the rear surfaces of the respective semiconductor chips are faced to each other so that the other longer latus (4A2) of the semiconductor chip (4) and one longer latus (5A1) of the semiconductor chip (5) may confront the side of leads (10B), and supporting leads (8) are bonded and fixed onto the circuit forming surface (4A) of the semiconductor chip (4) or the circuit forming surface (5A) of the semiconductor chip (5). Owing to such a construction, the structure of a semiconductor device can be thinned. The semiconductor chips (4), (5) are bonded and fixed to each other in a state where the, positions of the respective semiconductor chips are staggered relatively to each other so that the electrodes (6) of the semiconductor chip (4) may lie outside the other longer latus (5A2) of the semiconductor chip (5), and that the electrodes (6) of the semiconductor chip (5) may lie outside the other longer latus (4A2) of the semiconductor chip (4). Owing to such a construction, the available percentage of the products of the semiconductor device can be heightened.
摘要:
A LOC type semiconductor device comprises a semiconductor chip having a main surface in which semiconductor elements and a plurality of bonding pads are formed, and a back surface opposite the main surface; a plurality of leads each having an inner part and an outer part, and including a plurality of first leads having inner end portions extended on the main surface of the semiconductor chip and a plurality of second leads having inner end portions terminating near the semiconductor chip; bonding wires electrically connecting the bonding pads to bonding portions of the inner parts of the first and the second leads; and a sealing member sealing the semiconductor chip therein. A first bending portion is formed in the inner part of each second lead to prevent the sealing member from transformation by forming the sealing member in satisfactory resin balance between an upper portion and a lower portion of the sealing member.
摘要:
A chip mounting method is proposed which considers facilitating the testing of semiconductor chips when a plurality of semiconductor chips are sealed in a single resin sealing body. This method also considers its application to a variety of MCPs and system LSIs. In a single package, one signal output terminal of the first semiconductor chip and a first external terminal of the semiconductor device are internally connected independently. One signal input terminal of the second semiconductor chip and a second external terminal of the semiconductor device are internally connected independently. The first and second external terminals of the semiconductor device are connected outside of the semiconductor device to complete the connection between the signal output terminal and the signal input terminal.
摘要:
A chip mounting method is proposed which considers facilitating the testing of semiconductor chips when a plurality of semiconductor chips are sealed in a single resin sealing body. This method also considers its application to a variety of MCPs and system LSIs. In a single package, one signal output terminal of the first semiconductor chip and a first external terminal of the semiconductor device are internally connected independently. One signal input terminal of the second semiconductor chip and a second external terminal of the semiconductor device are internally connected independently. The first and second external terminals of the semiconductor device are connected outside of the semiconductor device to complete the connection between the signal output terminal and the signal input terminal.
摘要:
In a package of an LOC (Lead On Chip) structure in which inner lead portions are partially arranged over a major face of a semiconductor chip, there is disclosed a technique for thinning the package and speeding up signal transmission. Specifically, by partially reducing the thicknesses of the signal inner leads arranged over the major face of the semiconductor chip, the thickness of a sealing resin is reduced while ensuring the mechanical strength of the package. Moreover, the signal inner leads arranged over the major face of the semiconductor chip are arranged at predetermined spacings from the major face of the semiconductor chip. The power supplying inner leads are bonded to the major face of the semiconductor chip, thus providing a package having a reduced parasitic capacitance.
摘要:
In a package having an LOC (Lead On Chip) structure in which inner lead portions are partially arranged over a major face of a semiconductor chip, there is a technique for thinning the package and speeding up signal transmission. Specifically, by partially reducing the thicknesses of the signal inner leads arranged over the major face of the semiconductor chip, the thickness of a sealing resin is reduced while ensuring the mechanical strength of the package. Moreover, the signal inner leads arranged over the major face of the semiconductor chip are arranged at predetermined spacings from the major face of the semiconductor chip. The power supplying inner leads are bonded to the major face of the semiconductor chip, thus providing a package having a reduced parasitic capacitance.
摘要:
Ends of inner leads are disposed in the vicinity of a peripheral end of a semiconductor chip and a portion of an insulating film tape is affixed to a main surface of the semiconductor chip by an adhesive while other portions of the insulating film tape are affixed to portions of the inner leads by an adhesive. Electrode pads provided in the main surface of the semiconductor chip are electrically connected to the ends of the corresponding inner leads by bonding wires, and the semiconductor chip, the inner leads, the electrode pads, the insulating film tape and the bonding wires are sealed by a resin molding. The thickness of the insulating film tape is smaller than a height from the main surface of the semiconductor chip to an apex of the bonding wire. Surfaces of the ends of the inner leads connected to the bonding wires are positioned lower than the main surface of the semiconductor chip and the inner leads are positioned between the main surface and an opposite surface of the semiconductor chip.
摘要:
The present invention provides a mammalian stem cell suspension containing mammalian stem cells and at least one polysaccharide such as trehalose, and the like; a mammalian stem cell aggregation inhibitor containing polysaccharide such as trehalose, and the like; a method of suppressing aggregation of mammalian stem cells, containing suspending the mammalian stem cells in an aqueous physiological solution containing polysaccharide; an inhibitor of a decrease in the survival rate of mammalian stem cells containing polysaccharide such as trehalose and the like; a method of suppressing a decrease in the survival rate of mammalian stem cells, containing suspending the mammalian stem cells in an aqueous physiological solution containing polysaccharides, and the like.
摘要:
A memory card wherein a substrate is affixed to a cap is formed without the projection of substrate edges from a back surface of the cap. The memory card includes a substrate having a sealing member bonded to a recess in the cap. By utilizing a difference in thermal expansion coefficient between the sealing member and the substrate, the substrate is warped so that its central portion projects away from the cap. The shallow recess is deeper than the sum of the thickness of the substrate and the thickness of an adhesive for bonding the substrate to the bottom of the shallow recess, whereby peripheral edges of the substrate retract into the shallow recess without projecting from the back surface of the cap. The cap is shaped as a card several millimeters thick. A memory chip and control chip are incorporated in the sealing member.