摘要:
A multilayer printed wiring board is equipped with a core board 20, a build-up layer 30 formed on the core board 20 so as to have a conductor pattern 32 on the upper surface thereof, a low-elasticity layer 40 formed on the build-up layer 30, lands 52 that are provided on the upper surface of the low-elasticity layer 40 and connected to an IC chip 70 via solder bumps 66, and conductor posts 50 that penetrate through the low-elasticity layer 40 and electrically connect the lands 52 to the conductor pattern 32. The low-elasticity layer 40 is formed of resin composition containing epoxy resin, phenol resin, cross-linked rubber particles and a hardening catalyst.
摘要:
This invention provides a multilayer printed wiring board which achieves fine pitches. A heat resistant substrate is incorporated in a multilayer printed wiring board and interlayer resin insulation layer and conductive layer are placed alternately on the heat resistant substrate. A built-up wiring board in which respective conductive layers are connected by via hole is formed. A via hole is formed on the surface of a mirror-processed Si substrate by using a heat resistant substrate composed of Si substrate so that finer wiring than a resin substrate having unevenness in its surface can be formed, whereby achieving fine pitches. Further, by forming the wiring on a mirror processed surface, dispersion of wiring decreases thereby decreasing dispersion of impedance.
摘要:
A connection terminal (80) to mount an electronic component (2) is formed on a first base material in which a metal foil is disposed on a support body so as to be detachable. Then, the connection terminal (80) and a bump (20) of an electronic component (2) are electrically connected and underfill material (4) is filled between the electronic component (2) and the first base material. Next, insulative material (3) is disposed on the first base material to cover the electronic component (2). Then, the support body and the metal foil are detached, and the unnecessary portion of the exposed metal foil is etched away. Accordingly, a wiring board (1) with a built-in electronic component is obtained.
摘要:
A printed circuit board according to the present invention is a printed circuit board (4) including a component mounting pin (1) made of a metal wire to connect with a semiconductor chip (10). The semiconductor chip (10) is a surface mounting type semiconductor chip having an electrode pad on its mounting surface for use in a flip-chip mounting system. The component mounting pin (1) is formed by using wire-bonding technology. This printed circuit board (4) is able to decrease malconnections or disconnection caused by a difference between the coefficients of thermal expansion of the semiconductor chip (10) and the printed circuit board (4).
摘要:
[PROBLEMS] To provide a multilayer printed wiring board for obtaining fine pitch. [MEANS FOR SOLVING PROBLEMS] In a build-up wiring layer, a heat resistant substrate (30) is incorporated in a multilayer printed wiring board (10), an interlayer resin insulating layer (50) and a conductor layer (58) are alternately laminated on the heat resistant substrate, and conductor layers are connected by via holes (60). Since the heat resistant substrate composed of a Si substrate (20) is used, a wiring thinner than that formed on an uneven resin substrate can be formed by making via holes (48) on the surface of the mirror-finished Si substrate, and thus, fine pitch is obtained. Furthermore, by forming a wiring on the mirror-finished surface, variance of the wiring is reduced and fluctuation of impedance is reduced.
摘要:
A multilayer printed wiring board 10 includes: a core substrate 20; a build-up layer 30 formed on the core substrate 20 and having a conductor pattern 32 on an upper surface; a low elastic modulus layer 40 formed on the build-up layer 30; lands 52 that are disposed on an upper surface of the low elastic modulus layer 40 and connected via solder bumps 66 to a semiconductor chip 70; and conductor posts 50 that are passing through the low elastic modulus layer 40 and electrically connecting lands 52 with conductor patterns 32. The conductor posts 50 are formed to have the diameters of an upper portion and a lower portion of 80µm, the diameter of an intermediate portion of 35µm, the height of 200µm, and the aspect ratio Rasp (height/minimum diameter) of 5.7 and the maximum diameter/minimum diameter of 2.3.
摘要:
The purpose of the present invention is to provide an interposer able to ease suitably the stress concentration at the conductor portion such a via conductor even when a semiconductor element generates heat, and an interposer in according with the present invention comprises at least one layer of an inorganic insulating layer, the first wiring formed in or on the surface of the above-described inorganic insulating layer, at least one layer of an organic insulating layer formed on the outmost layer inorganic insulating layer and on the above-described first wiring, the second wiring formed on the surface of the above-described organic insulating layer, and a conductor portion for connecting the above-described first wiring and the above-described second wiring.
摘要:
The objective of the present invention is to provide an interposer in which numerous wiring distributions may be arranged with the smallest possible number of layers, and which is suitable for large-volume signal transmission between electronic components. The interposer according to the present invention is structured with: a support substrate; a first insulation layer made of inorganic material and formed on the support substrate; first lands formed in the first insulation layer; second lands formed in the first insulation layer; first wiring formed in the first insulation layer and electrically connecting the first lands and the second lands; a second insulation layer formed on the first insulation layer, the first lands, the second lands and the first wiring, and having first opening portions for first via conductors and second opening portions for second via conductors; first pads formed on the second insulation layer to load a first electronic component; second pads formed on the second insulation layer to load a second electronic component; second wiring formed on the second insulation layer; first via conductors formed in the first opening portions and electrically connecting the first lands and the first pads; and second via conductors formed in the second opening portions and electrically connecting the second lands and the second wiring. It is characterized that the first pads and the second pads are electrically connected through the first wiring and the second wiring, and the second wiring has a longer wiring length and a greater thickness than the first wiring.
摘要:
The present invention is to provide a printed wiring board in which malconnection or disconnection caused by a difference between coefficients of thermal expansion of a semiconductor chip and a printed wiring board can be decreased even when a highly-integrated semiconductor apparatus is mounted thereon and an electronic device using the same. An electronic device (4) according to the present invention includes a printed wiring board (1) with a component mounting pin (18) and a surface-mounting type semiconductor apparatus (2) with an electrode pad (3), wherein the component mounting pin (18) has elasticity and is urged against the electrode pad (3) to maintain electric connection.