Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Kyocera Document Solutions Inc.

Yoji Ueda

Fumio Echigo

Shozo Ochi

Yasuhiro Nakatani

Daizo Andoh

Tadashi Nakamura

Yoshihiro Bessho

Takeshi Suzuki

Satoru Tomekawa

Tatsuo Ogawa

Tousaku Nishiyama

Susumu Matsuoka

Koso Matsuno

Yuji Kamiyama

Hiroaki Katsura

Kouhei Enchi

A cleaning device has a housing where an opening and a toner storage portion are formed, a cleaning member arranged in the opening, a collection roller collecting toner attached to the cleaning member, a blade scraping off toner attached to the collection roller, a sheet member dividing between the toner storage portion and the opening, and a sealing member arranged to be in contact with the housing and both end parts of the outer circumferential surface of the collection roller in the axial direction. A first region having a predetermined surface roughness is formed in a middle part of the circumferential surface of the collection roller in the axial direction, and a second region having a lower surface roughness than the first region is formed next to both end parts of the first region in the axial direction.

Cleaning device and image forming apparatus therewith

An electrode bonding structure sealed with a sealing resin, in which a flexible substrate is bonded to a first substrate via an adhesive, wherein: a region along a bottom face edge of an flexible substrate end part is bonded, via the adhesive, to an inner side region of a region along a top face edge of an first substrate end part; a gap is formed between an inner side region of the region along the bottom face edge of the flexible substrate end part and the region along the top face edge of the first substrate end part; the sealing resin is formed so as to enter, while covering a top face of the flexible substrate end part, at least a portion of the gap; and a height of the gap gets smaller towards the adhesive from the top face edge of the first substrate end part.

Electrode bonding structure, and manufacturing method for electrode bonding structure

A multilayer circuit board includes: two or more layers of electrical insulative base members; and two or more layers of conductive patterned layers. At least two of the conductive patterned layers include coil patterns that will be a part of a coil, through holes are provided at predetermined positions of the electrical insulative base members, the positions being sandwiched between the coil patterns, so as to enable communication between respective end portions of the coil patterns, and conductive paste charged in the through holes allows electrical connection to be established between the respective end portions. The coil is formed so as to be wound in a direction perpendicular to a thickness direction of the multilayer circuit board. With this configuration, a multilayer circuit board can be provided, which facilitates increasing the winding number of a coil and has excellent flexibility of circuit design.

Multilayer circuit board

The present invention provides a method of manufacturing a printed circuit board, which includes preparing a dielectric substrate, coating surfaces of the dielectric substrate, filling a via hole with a conductor, peeling mold-releasing films, compressing the dielectric substrate and forming metal foils. The dielectric substrate has patterned wiring layers on both surfaces, and the wiring layers are connected electrically with each other by the conductor. The dielectric substrate is made of a glass cloth or a glass nonwoven fabric impregnated with a thermosetting epoxy resin mixed with fine particles, and the conductive filler in the conductor has an average particle diameter larger than that of the fine particles. Accordingly, the printed circuit board has an improved moisture resistance as a whole and also excellent connection reliability and repair resistance. In addition, the dielectric substrate of the printed circuit board has an improved mechanical strength such as flexural rigidity.

Method for manufacturing printed circuit board

A printed circuit board of the present invention is formed of an electrical insulating base material with through holes that are formed in a thickness direction of the electrical insulating base material and are filled with an electrical conductor; the electrical insulating base material including a core layer formed by impregnating a holder with a resin and resin layers formed on both sides of the core layer; and wiring layers that are formed on both surfaces of the electrical insulating base material into a predetermined pattern and are electrically connected to each other by the electrical conductor. The wiring layer is embedded in at least one of the resin layers. The resin layers on the both sides have different thicknesses from each other, and a thinner layer out of the resin layers has a thickness equal to or smaller than a mean particle diameter of an electrically conductive filler contained in the electrical conductor. By adjusting the thickness of the resin layers formed on both sides of the resin holder such as a glass cloth, it is possible to ensure high reliability when electrically connecting circuit boards using an electrically conductive paste as the electrical conductor.

Printed circuit board and method for producing the same

The present invention provides a printed circuit board, which includes a dielectric substrate having via holes formed in the thickness direction, and a conductor including a conductive filler is filled in the via holes. The dielectric substrate has patterned wiring layers on both surfaces, and the wiring layers are connected electrically with each other by the conductor. The dielectric substrate is made of a glass cloth or a glass nonwoven fabric impregnated with a thermosetting epoxy resin mixed with fine particles, and the conductive filler in the conductor has an average particle diameter larger than that of the fine particles. Accordingly, the printed circuit board has an improved moisture resistance as a whole and also excellent connection reliability and repair resistance. In addition, the dielectric substrate of the printed circuit board has an improved mechanical strength such as flexural rigidity. The present invention also provides a method of manufacturing such a printed circuit board.

Printed circuit board and method of manufacturing the same

A circuit board is configured so as to include not less than two wiring layers, an insulator layer for electric insulation between the wiring layers, and an inner-via-hole conductive member provided in the insulator layer in a thickness direction of the insulator layer, for electric connection between the wiring layers. The insulator layer is made of a composite material containing an organic resin and a material having a smaller thermal expansion coefficient than that of the organic resin, and includes a surface part, a core part, and a surface part laminated in the stated order, the surface part having a high content of the organic resin, the core part having a low content of the organic resin. The wiring layers have a land portion that is connected with the inner-via-hole conductive member, the land portion being embedded so as to be substantially in contact with the core part, and the inner-via-hole conductive member has a thickness substantially equal to a thickness of the core part. According to this configuration, a part of the metal foil is embedded in the insulator layer so as to be in contact with the core layer. Therefore, this makes it possible to provide a circuit board in which portions of the conductive material can be selectively compressed, and which hence is capable of ensuring stable connection between layers.

Growing community of inventors

Osaka, Japan

Yoji Ueda