摘要:
A multilayer wiring board for mounting a semiconductor chip or a semiconductor device, in which the number of wiring layers in minimized, having a plurality of wiring layers, in which each of said wiring layers includes lands arranged in the form of a square lattice and wiring patterns each having one end connected to one of said lands and the other end extending outward beyond an outermost row of said lattice, said lands having a land pitch p and a land diameter d and said wiring patterns having a pattern width w and an interpattern space s, said p, d, w, and s satisfying the following relationship: p−d
摘要:
A wiring board has vias which penetrate the wiring board from one side to the other side. The vias are radially arranged in the direction from one side to the other side so that the interval between the vias on one side can be made smaller than the interval between the vias on the other side. In order to prevent the vias from being electrically short-circuited to each other, even if the interval between the vias provided on one side of the wiring board is extremely reduced, a plurality of vias are radially arranged in the direction from one side of the wiring board to the other side so that an interval between the vias on one side of the wiring board can be made smaller than interval of the vias on the other side. A conductor forming the core portion of the via is coated with a sheath portion made of insulating material.
摘要:
A semiconductor device includes a flat package substrate having a main surface on which is defined a semiconductor chip mount surface portion and onto which a semiconductor chip is to be mounted and a peripheral surface portion surrounding the semiconductor chip mount surface portion. An electrically insulating elastic layer is provided on the peripheral surface portion of the flat package substrate and a wiring pattern film is provided on an exposed main surface of the elastic layer. The wiring pattern film includes a base insulting film and wiring patterns which are formed on the base insulation film, each wiring pattern having a first end connected to an external connection terminal and a second end connected to the semiconductor chip. The semiconductor chip is sealed with a resin by potting.
摘要:
An aluminum nitride circuit board includes an aluminum nitride ceramic body. An inner conductor metal which is to be used as a wiring material is formed in the aluminum nitride ceramic body. The inner conductor metal is mainly made of copper, a melting point of which is lower than a firing temperature of the aluminum nitride ceramic. A layer mainly made of a periodic table IVa group metal or compound, such as titanium, zirconium, or hafnium, is formed in an interface between the aluminum nitride ceramic body and the inner conductor metal.
摘要:
A ceramic package includes a high thermal conductive ceramic substrate (AlN or SiC sintered substrate) on which a semiconductor element is mounted, and a mullite sintered frame having metal conductive paths therein and joined to the substrate.
摘要:
A wiring substrate includes a composite substrate including an oxidized aluminum substrate portion in which a large number of penetration conductors penetrating in a thickness direction are provided, and a frame-like aluminum substrate portion provided around the oxidized aluminum substrate portion, and a wiring layer of n layers (n is an integer of 1 or more) connected to the penetration conductors.
摘要:
A semiconductor device which reduces and simultaneously achieves a uniform mounting height, does not require complicated steps for mounting individual chips, improves the manufacturing yield, achieves a uniform height of the semiconductor device without being affected by the variation in thickness of the chips, and enables execution of electrical tests all together and a process for production of the same, wherein a semiconductor chip is housed, with its active surface facing upward, in a through hole of a printed circuit board provided with an interconnection pattern on its top surface, electrode terminals of the active surface are connected to the interconnection pattern by bonding wires, a sealing resin layer seals the bonding wires and semiconductor chip together and fixes the semiconductor chip in the through hole, and the bottom surface of the printed circuit board, the downward facing back surface of the semiconductor chip, and the bottom surface of the sealing resin layer are finished to the same flat surface by grinding and polishing.
摘要:
Wiring board having a wiring layer to which electronic components are electrically connected, in through-holes closed at one of the ends thereof by the wiring layer are formed at predetermined positions of the wiring board, and a low melting point metal for electrically connecting the wiring layer to the electronic components is filled into the through-holes, and a semiconductor device using the same. The production methods of the wiring board and the semiconductor device are also disclosed.
摘要:
A multi-layer circuit board for mounting an electronic part such as a semiconductor chip having as many pins as 40×40 pins arranged as an array on the side of the mounting surface or a semiconductor device has a plurality of layers, each layer disposed one above another and containing lands arranged as an array disposed at an angle to the edge of the mounting surface. On each layer a plurality of the lands have connected thereto circuits extending from the lands to the edge of the mounting surface, and also lands not connected to circuits. Those lands not connected to circuits are connected with via holes to orther layers. The numbers (n−2) of lands and the position of lands connected to circuits on a layer is defined where n is the smallest integer that satisfies the equation m≧(k+1) wherein m={(land pitch)×(n−1)−(land diameter)−(space between patterns)}÷(pattern width+space between patterns) and k=&agr;(n−1)+(n−2).
摘要:
A chip-sized semiconductor device includes a semiconductor element having a plurality of electrodes and a plurality of connecting pads electrically connected to the respective electrodes. A connecting board includes a base substrate having a first surface and a second surface, a plurality of connecting holes extending from the first surface to the second surface, a plurality of lands formed on the first surface to close the respective connecting holes, the lands being arranged in conformity with positions of the connecting pads of the semiconductor element, each of the connecting pads having a surface area smaller than that of the land. The semiconductor element is mounted on the connecting board in such a manner that the connecting pads of the semiconductor element are electrically connected to the respective lands of the connecting board by means of a plurality of bumps, respectively. A plurality of external connecting terminals on the second surface of the base substrate to be in contact with the respective lands through the respective connectings holes.