摘要:
An electronic device includes: a base; a conductor pattern formed on the base; a circuit chip electrically connected to the conductor pattern; and a reinforcing member which is disposed on the base to surround the circuit chip, whose outer shape is like a ring, and which includes concentric rings as an internal structure. The electronic device further includes a sealing member which fills an inside of the reinforcing member while covering the top of the circuit chip, thereby sealing the circuit chip on the base.
摘要:
An electronic component is equipped with electrode protrusions that make it possible to mount the electronic component without covering connection pads of a circuit board with solder and to dispose the connection pads of the circuit board with a narrow pitch while preventing electrical shorting of the connection electrodes during mounting. A method of manufacturing an electronic component equipped with connection electrodes, where electrode protrusions are covered with solder, includes a step of heating a solder sheet to a semi-molten state and pressing the electronic component onto the solder sheet to place the electrode protrusions in contact with the solder sheet and a step of retracting the electronic component from a position where the electrode protrusions contact the solder sheet to transfer solder onto outside surfaces of the electrode protrusions that contacted the solder sheet.
摘要:
A method of manufacturing a semiconductor device flip-chip bonds electrode terminals of a substrate and a semiconductor chip together by solid-phase diffusion and underfills a gap between the substrate and the semiconductor chip with a thermosetting resin without the bonds between the terminals breaking due to heat in an underfill hardening step. The method includes a bonding step of flip-chip bonding the electrode terminals of the substrate and the semiconductor chip by solid-phase diffusion, an underfill filling step of filling the gap between the substrate and the semiconductor chip with the underfill material, and the underfill hardening step where the underfill material is heated to the hardening temperature to harden the underfill material. During the underfill hardening step, a member with a lower coefficient of thermal expansion out of the substrate and the semiconductor chip is heated to a higher temperature than the other member.
摘要:
A slider tester includes a driving unit that rotates a test medium, a set plate that detachably supports a slider as a single body, and an investigating apparatus that is electrically connected to the slider supported by the set plate and investigates the characteristics of the slider. A movable support part 30 that tiltably supports the slider is provided on the set plate. There is also provided a pressing mechanism that elastically presses the slider via the movable support part toward a surface of the medium to dispose the slider floating over the surface of the medium. The pressing mechanism includes an elastic body 56 composed of a plate spring that contacts the movable support part and elastically presses the movable support part.
摘要:
A method and apparatus for assembling a carriage assembly attach suspensions to carriage arms without deformation and with higher accuracy than with the conventional art.Suspensions are placed on carriage arms by aligning engagement holes 10a provided in the carriage arms and spacer holes provided in spacer portions of the suspension. A bar-shaped operation member whose outer diameter is equal to or smaller than the inner diameter of the spacer holes is inserted into the spacer holes and longitudinal ultrasonic vibration is applied to the bar-shaped operation member to cause expanding and contracting motion in the radial direction of the spacer hole, so that when the diameter of the operation member expands, the operation member contacts edge portions of the spacer holes of the spacer portions and crimps the edge portions to fix the suspensions to the carriage arms.
摘要:
A method of ultrasonic mounting can increase mounting efficiency by using high-frequency ultrasound and can also mount large semiconductor chips. The method ultrasonically bonds a semiconductor chip 52 to a substrate 50 using an ultrasonic mounting apparatus including a horn 15 that propagates ultrasonic vibration of an ultrasonic vibrator, the horn 15 being made of a ceramic that has a higher vibration propagation speed than metal. The method includes steps of disposing the substrate 50 on a stage 13, disposing the semiconductor chip 52 on the substrate 50, and placing the semiconductor chip 52 in contact with a convex part 15a provided on the horn 15 and applying ultrasonic vibration to bond the semiconductor chip 52 to the substrate 50.
摘要:
The present invention provides a radio frequency identification (RFID) tag which exchanges information with an external device in a noncontact manner, in which a paste is used as a material for an antenna, and which is designed to prevent sinking of bumps. A stopper for limiting sinking of bumps of a circuit chip caused by a pressing force when the circuit chip is connected to an antenna is provided on the circuit chip or a base at a position adjacent to the bumps.
摘要:
The ultrasonic mounting method is capable of uniformly bonding bumps of an electronic component to a circuit board and improving reliability of ultrasonic-mounting the electronic component. The method comprises the step of applying ultrasonic vibrations to the electronic component so as to flip-chip-bond the electronic component to the circuit board having electrodes. The ultrasonic vibrations are applied in a direction parallel to a surface of the electronic component, and loads are vertically applied to the surface of the electronic component in conjunction with vibration cycles of the ultrasonic vibrations.
摘要:
The semiconductor device of the present invention is capable of restricting alloying metals and improving electrical connection between a semiconductor chip and a mount board. The semiconductor device comprises: the semiconductor chip having terminal sections; and bumps for electrical connection, the bumps being formed at the terminal sections. Each of the bumps is made of a two-layer wire, which includes a core member and a jacket member, and formed by a stud bump bonding process.
摘要:
A resin coating method for applying resin to a predetermined region of a wiring board includes the steps of imaging an external appearance of the resin extruded from a resin application device; and automatically adjusting an amount of the resin extruded from the resin application device based on the external appearance of the resin obtained in the imaging step.