Sumitomo Electric Industries, Limited

Sumitomo Wiring Systems, Limited

Autonetworks Technologies, Limited

Sumitomo Electric Printed Circuits, Inc.

Shigeki Shimada

Takuya Yamanaka

Tetsuya Ito

Takashi Tonosaki

Hiroshi Ueda

Koji Nitta

Takafumi Uemiya

Tetsuya Shinozaki

Atsushi Kimura

Suguru Yamagishi

Satoshi Kiya

Hiroki Hirai

Toshikazu Sakurai

Hiroshi Nakano

Kenji Okamura

Masahide Hio

Shinji Iihoshi

Mitsugu Furutani

Tetsuya Aihara

Yuichi Nakanishi

Tsuyoshi Haga

Kazumasa Kobayashi

Shigeru Ogihara

Kentaro Hirai

Tadahiro Kaibuki

Kaori Shimizu

Yoshiaki Yanagimoto

Daisuke Sato

Satoshi Suzuki

Haruna Oya

A high-frequency circuit includes a first electric conductor layer, a first dielectric layer, a circuit layer, a second dielectric layer, a second electric conductor layer arranged in this order, and the circuit layer includes a ground pattern and a transmission line of a high-frequency signal. An electromagnetic wave shield is disposed around the transmission line. The electromagnetic wave shield includes a ground electric conductor on inner surfaces of a plurality of holes extending through the first dielectric layer, the ground pattern, the second dielectric layer, the first electric conductor layer, and the second electric conductor layer. The plurality of holes are a plurality of elongated holes provided at an interval in a direction in which the transmission line is surrounded. In each of the plurality of elongated holes, a longitudinal dimension in the direction in which the transmission line is surrounded is larger than a width dimension.

High-frequency circuit

A press-fit terminal includes a press-fit portion including two contact pieces facing each other with an eyehole interposed therebetween, where each of the two contact pieces includes a parallel portion, a front spring portion extending from the parallel portion in a direction in which the press-fit portion is inserted, and a rear spring portion extending from the parallel portion in a direction opposite to the direction in which the press-fit portion is inserted, the two parallel portions being parallel to each other, a thickness of the press-fit portion is 0.3 mm or more and 0.5 mm or less, when a length of the eyehole is Le [mm] and a length of the parallel portion is Ls [mm], Ls/Le is 0.57 or more and 0.65 or less, and when front spring strength is G[mm] and rear spring strength is G[mm], G/Gis 0.55 or more and 1.45 or less.

Press-fit terminal and connector device

Assembly parts for connector device including: substrate having through hole; press-fit terminal that is rod shape member to be press-fitted into through hole, wherein press-fit terminal includes leading end, press-fit, and base end portions, press-fit portion includes parallel portion with two parallel contact pieces separated by eye hole; and tapered portion connecting parallel and leading end portions together, in vertical cross section of press-fit terminal, eye hole with curved line constitutes leading end-side portion, lines constitute tapered portion include contact and reference points, contact points first come into contact with opening edge of through hole when press-fit terminal inserted into through hole, reference points are intersections of lines that constitute tapered portion and specific orthogonal lines, specific orthogonal lines are orthogonal lines passing through end points of curved line, of lines orthogonal to lines that constitute tapered portion, contact points are located closer to leading end portion than reference points.

Assembly parts for connector device and connector device

A high-frequency circuit includes a first dielectric layer, a circuit layer, a second dielectric layer arranged in this order, the circuit layer includes a transmission line of a high-frequency signal and a ground pattern disposed around the transmission line. An electromagnetic wave shield is disposed in the first dielectric layer and the second dielectric layer around the transmission line. The electromagnetic wave shield includes a first ground electric conductor formed on an inner surface of at least one first hole formed to extend through the first dielectric layer without extending through the ground pattern, and a second ground electric conductor formed on an inner surface of at least one second hole formed to extend through the second dielectric layer without extending through the ground pattern. The first ground electric conductor and the second ground electric conductor are each electrically connected to the ground pattern.

A press-fit terminal inserted into through hole of a circuit board along insertion direction includes a base portion extending in insertion direction, distal end portion, and two deformable portions. The distal end portion is on a front side to base portion in insertion direction and includes distal end portion side corner portions. The two deformable portions connect base portion and distal end portion and are contacted with an inner wall of through hole and elastically deformed. The two deformable portions include deformable portion side corner portions and deformable portion side corner portions include outer deformable portion side corner portions on outer side in direction crossing insertion direction. The two deformable portions include easy deformable portions, in portions having outer deformable portion side corner portions with curved surfaces whose radius of curvature RL is greater than a radius of curvature RS of curved surfaces of distal end portion side corner portions.

Press-fit terminal

An object is to, for physical properties, holding force, contact area, and insertion force in a trade-off relationship, set the holding force to 37 N or more, the contact area to 0.72 mm2 or more, and the insertion force to 90 N or less. A press-fit terminal is to be press-fitted into a through hole formed in a circuit board. A press-fit part includes a beam and an eye hole that is surrounded by the beam. The beam includes two parallel parts that are parallel to each other. In the press-fit part, G1/G2 is 0.20 or more and 1.05 or less where a front-side spring strength is G1 [mm3] and a rear-side spring strength is G2 [mm3] calculated under the following conditions, and G is 0.007 mm3 or more and 0.012 mm3 or less where a spring strength G [mm3] is G1+G2.

Press-fit terminal, connector for board, and board-equipped connector

A printed wiring board of the present invention includes an insulating substrate layer; a first conductive layer laminated to one surface of the substrate layer; a second conductive layer laminated to another surface of the substrate layer; and a via hole formed along an inner surface of a connection hole that is provided, in a thickness direction, through the substrate layer and the first conductive layer, the via hole electrically coupling the first conductive layer and the second conductive layer. A cross-sectional shape of the connection hole along at least one surface of the substrate layer is an irregular shape.

Printed wiring board

A press-fit terminal includes an end part that is to be inserted into a through-hole of a circuit board. The end part is connected electrically to the through-hole by being in elastic contact with an inner wall of the through-hole. The press-fit terminal also includes a base part opposite to the end part. Two elastic contact pieces are between the end part and the base part and are disposed to face each other through an opening. A stress dispersion part is provided in at least one of a region that includes a border between the end part and the elastic contact pieces and a region that includes a border between the base part and the elastic contact pieces. The stress dispersion part protrudes in the same direction as an expanding direction in which the elastic contact pieces expand.

A plurality of terminal fittingsare mounted to a housingboard connecting portionshaving mounting portionsat lower ends protrude rearward, fixed fittingshaving mounting platesat lower edges are mounted to opposite side surfaces of the housingand the mounting portionof each terminal fittingand the mounting platesof the fixed fittingsare secured to a PCBby reflow soldering. During the reflow soldering, a drawing force toward the PCBacts on each of the terminal fittingsand the fixed fittingsbased on surface tension of molten solder H, but the center of the fixed fittingin the fore/aft direction of the board connecting portionis positioned forward of the center of gravity position O of a connectorand rotation moment Mb toward the PCBacts on the front of the housingbased on a drawing force Fb on the side of the fixed fittingto prevent the front from being raised.

Board connector

A contact probe comprises a tip portion for making contact with a subject surface, a supporting portion, and a spring portion for connecting the other two members. The tip portion has a corner portion whose radius of curvature is larger than that of the opposite corner portion that moves in the lead during the scrubbing by the pressing force. The insulating layer on the subject surface is sufficiently removed by the scrubbing to secure the electrical contact, and the amount of shavings is minimized during the dissociation of the contact probe. Formation of scratches on the subject surface is reduced. Another contact probe for a ball-shaped electrode has a tip portion with a recess, which has a protrusion and bottom. The protrusion breaks the insulating layer on the electrode to secure the electrical contact. The bottom makes contact with the electrode to prevent the protrusion from excessively biting the electrode.

Contact probe

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Osaka, Japan

Shigeki Shimada