Abstract:
After preliminary supply of an equal amount of solder to all of stud-bumps of a semiconductor part, establishing solder connection between the stud-bumps and connecting pads of a circuit substrate. A method for mounting a semiconductor part on a circuit substrate is provided, which includes the steps of preparing the semiconductor part (10) having a surface thereof provided with a plurality of stud-bumps (12), preparing a solder substrate (13) having a surface thereof on which solid-solders (14) corresponding to respective of the plurality of stud-bumps (12) are arranged, preparing the circuit substrate (20) having a surface thereof provided with connecting pads (21) corresponding to respective of the plurality of stud-bumps, attaching, to respective tip ends of the plurality of stud bumps, the corresponding solid-solders on the solder substrate, separating the solid-solders attached to the tip ends of the stud-bumps from the solder substrate, contacting the solid-solder attached to respective of the tip ends of the stud-bumps with the corresponding connecting pads, and melting the solid-solders contacted with the corresponding connecting pads thereby establishing solder connection between respective of the stud-bumps and the corresponding connecting pads.
Abstract:
PROBLEM TO BE SOLVED: To provide alignment with high accuracy having affinity with processes of three-dimensional packaging.SOLUTION: In combination of a plurality of studs (40) for regulating relative motions of a plurality of silicon chips in a lateral direction when solder bumps melt between the plurality of silicon chips, according to pitches of a plurality of solder bumps (10) to be arranged between the plurality of silicon chips, positions in the lateral direction are determined by using the positions of the solder bumps in the lateral direction as reference, and the plurality of studs (40) are provided at one silicon chip and the other silicon chip so that motions are relatively regulated when the plurality of silicon chips relatively move in the lateral direction, and positions between the plurality of solder bumps in the lateral direction set for each of the plurality of silicon chips are aligned (in a height direction).
Abstract:
Eine mm-Wellen-Elektronikbaugruppe, welche aus einer herkömmlichen Leiterplatten(PCB)-Technologie und einer Metallabdeckung aufgebaut ist. Bei der Montage der Baugruppe wird eine Standard-Bestückungs-Technologie angewendet und Wärme wird direkt zu einem Kontaktfleck auf der Baugruppe abgeleitet. Die Eingabe/Ausgabe von mm-Wellen-Signalen) erfolgt durch einen rechteckigen Wellenleiter. Die Montage der elektronischen Baugruppe auf einer elektrischen Leiterplatte (PCB) wird unter Anwendung herkömmlicher Wiederaufschmelz-Lötverfahren durchgeführt und umfasst eine Wellenleiter-Eingabe/Ausgabe-Einheit, die mit einer mm-Wellen-Antenne verbunden ist. Die elektronische Baugruppe sorgt für eine Übertragung von Niederfrequenz-, Gleichstrom- und Massesignalen von dem Halbleiterchip innerhalb der Baugruppe zu der PCB, auf welcher er montiert ist. Durch ein Impedanzanpassungsschema wird der Übergang vom Chip zur Hochfrequenz-Leiterplatte angepasst, indem die Masseebene innerhalb des Chips verändert wird. Eine Masseebene auf der Hochfrequenz-Leiterplatte umgibt kreisförmig den Hochfrequenzsignal-Höcker, um die elektromagnetischen Felder auf die Höckerregion zu begrenzen, wodurch Strahlungsverluste verringert werden.
Abstract:
PROBLEM TO BE SOLVED: To form a spacer resin (SR) pattern layer for accurate alignment of a light emitting element or a light receiving element with both of an optical waveguide (WG) pattern layer and an electric circuit (EC) pattern layer, from a wafer level of a semiconductor.SOLUTION: A base layer which has a through hole (via) provided to electrically communicate with an electric circuit (EC) pattern layer and is made of a resin is formed on a semiconductor (GaAs) wafer. A truncated cone or polygonal pyramid-shaped three-dimensional reflecting surface is formed to guide output of emitted light to or input of received light from an optical waveguide (WG) pattern layer. A metal film being doughnut-shaped, circular, or polygonal in plan view is vapor-deposited in a prescribed range from a center positioned on the basis of the position of the through hole. A cone or pyramid-shaped mold is stamped to the center. The direction of light is corrected by a formed taper structure to increase tolerance for accuracy and to reduce light loss.
Abstract:
PROBLEM TO BE SOLVED: To realize high-precision alignment expected between a plurality of chips or between a substrate and chips.SOLUTION: A combination of a plurality of studs is created for regulating relative movement of a plurality of chips in a lateral direction in the case where a solder bump is melted between the plurality of chips. For each of the plurality of chips, the combination of the plurality of studs having a predetermined width is created at a position where any solder bump is defined as a reference in the arrangement of a plurality of solder bumps disposed between the plurality of chips in accordance with a pitch of the plurality of solder bumps in such a manner that the plurality of solder bumps set to each of the plurality of chips are aligned within a predetermined range by regulating the relative movement of the plurality of chips even in the case where the plurality of chips are moved relatively to each other by melting of the plurality of solder bumps.
Abstract:
PROBLEM TO BE SOLVED: To attain solder bump connection with low stress so as to reduce stress to be applied on a silicon chip even in structure that a low-k material with low (fragile) mechanical strength is used for an interlayer insulation film of the silicon chip.SOLUTION: A square silicon chip (with thickness of 725 μm) and a laminate layer (with thickness of 1000 μm) are connected with each other by hardening after melting of a plurality of two-dimensionally arranged solder bumps between the square silicon chip and the laminate layer via a low-k layer (insulation layer of a wiring layer (BEOL)) which is arranged on the square silicon chip, and as a laminate, a plurality of partial solder bumps arranged from the circumference of the square silicon chip (equivalent to its four sides) to the inside to predetermined rate are adjusted by putting fillers to them so that degrees of elasticity become relatively lower than those of plurality of solder bumps at other parts.
Abstract:
A mm Wave electronics package constructed from common Printed Circuit Board (PCB) technology and a metal cover. Assembly of the package uses standard pick and place technology and heat is dissipated directly to a pad on the package. Input/output of mm Wave signal(s) is achieved through a rectangular waveguide. Mounting of the electronic package to an electrical printed circuit board (PCB) is performed using conventional reflow soldering processes and includes a waveguide I/O connected to an mm Wave antenna. The electronic package provides for transmission of low frequency, dc and ground signals from the semiconductor chip inside the package to the PCB it is mounted on. An impedance matching scheme matches the chip to high frequency board transition by altering the ground plane within the chip. A ground plane on the high frequency board encircles the high frequency signal bump to confine the electromagnetic fields to the bump region reducing radiation loss.