Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Hideo Suzuki

Michiaki Watanabe

Mitsunori Yokomakura

Mamoru Inoue

Takashi Ando

Yoshikazu Demi

Takashi Ichiyanagi

Masaru Nagaike

Norihiko Egami

Toshifumi Nakatani

Koji Akiyama

Toru Okazaki

Hideo Kurokawa

Manabu Kakino

Shigeru Ohki

A component suction method including feeding components accommodated in component storage spaces of a tape base to a predetermined position, lowering a nozzle capable of sucking the components supplied to the predetermined position, stopping the nozzle at a predetermined distance from an upper surface of the tape base, pushing an undersurface of the component up when the nozzle is at a bottom dead center position or a position adjacent to the center, vacuum-sucking the component by the nozzle at the bottom dead center position or at the position adjacent to the center, and moving the component sucked by the nozzle to a predetermined position of a board after the vacuum-sucking.

Component suction method

The present invention provides a multilayer wiring board in which warpage during reflow soldering can be reduced even if there is no sufficient space for disposing a dummy pattern or if a dummy pattern cannot be disposed. A difference between the ratios of copper remaining in wiring layers causes a difference between the amounts of thermal expansion of the wiring layers. The fiber bundle content of at least one resin base material layer is made different from that of the other resin base material layers, to cause a difference between the amounts of thermal expansion of the resin base material layers. This difference between the amounts of thermal expansion of the resin base material layers is used to cancel the difference between the amounts of thermal expansion of the wiring layers. Thus, warpage of the board during reflow soldering is reduced.

Multilayer wiring board

An elastic support member or an elastic support member-holding plate is located substantially in the middle portion of a frame portion ( and ), and a shadow mask is constructed such that a tension in the middle portion of the shadow mask is larger than the tension in the edge portions of the shadow mask . In another aspect, a plurality of elastic support members are such that at least two elastic support members having substantially different spring constants are combined.

Cathode ray tube and image display apparatus using the same

A color cathode-ray tube that can attenuate vibration of an entire shadow mask positively with a simple structure. The color cathode-ray tube includes a frame-shaped mask frame and a shadow mask in which many apertures are formed in a flat plate, the shadow mask being stretched and fixed in the mask frame in a condition in which a tension force is applied in one direction. The amplitude in the end portions of the shadow mask is not less than a certain amount relative to the amplitude in the center portion of the shadow mask, in a resonance of the shadow mask caused by a vibration propagated to the color cathode-ray tube. Furthermore, by providing vibration attenuators at the end portions of the shadow mask, vibrations at the end portions of the shadow mask are attenuated as the side surfaces of the shadow mask slide on the vibration attenuators. Thus, vibration of the entire shadow mask can be extinguished positively.

Color CRT having shadow mask with vibration attenuator

The present invention provides a color cathode-ray tube that can attenuate vibration of an entire shadow mask positively with a simple structure. The color cathode-ray tube comprises a frame-shaped mask frame and a shadow mask in which many apertures are formed in a flat plate, the shadow mask being stretched and fixed in the mask frame in a condition in which a tension force is applied in one direction. The amplitude in the end portions of the shadow mask is not less than a certain amount relative to the amplitude in the center portion of the shadow mask, in a resonance of the shadow mask caused by a vibration propagated to the color cathode-ray tube. Furthermore, by providing vibration attenuators at the end portions of the shadow mask, vibrations at the end portions of the shadow mask are attenuated as the side surfaces of the shadow mask slide on the vibration attenuators. Thus, vibration of the entire shadow mask can be extinguished positively.

Color cathode-ray tube with shadow mask and frame

A component suction method including feeding components ( ) accommodated in component storage spaces ( ) of a tape base ( ) to a predetermined position, lowering a nozzle ( ) capable of sucking the components supplied to the predetermined position, stopping the nozzle ( ) at a predetermined distance from an upper surface of the tape base, pushing an undersurface of the component up when the nozzle is at a bottom dead center position or a position adjacent to the center, vacuum-sucking the component by the nozzle at the bottom dead center position or at the position adjacent to the center, and moving the component sucked by the nozzle to a predetermined position of a board after the vacuum-sucking.

A color cathode-ray tube that can attenuate vibration of an entire shadow mask positively with a simple structure. The color cathode-ray tube includes a frame-shaped mask frame and a shadow mask in which many apertures are formed in a flat plate, the shadow mask stretched and fixed in the mask frame in a condition in which a tension force is applied in one direction. The amplitude in the end portions of the shadow mask is not less than a certain amount relative to the amplitude in the center portion of the shadow mask, in a resonance of the shadow mask caused by a vibration propagated to the color cathode-ray tube. Furthermore, by providing vibration attenuators at the end portions of the shadow mask, vibrations at the end portions of the shadow mask are attenuated as the side surfaces of the shadow mask slide on the vibration attenuators. Thus, vibration of the entire shadow mask can be extinguished positively.

Color crt having shadow mask with vibration attenuator

A component suction method including feeding components (,) accommodated in component storage spaces (,) of a tape base (,) to a predetermined position, lowering a nozzle (,) capable of sucking the components supplied to the predetermined position, stopping the nozzle (,) at a predetermined distance from an upper surface of the tape base, pushing an undersurface of the component up when the nozzle is at a bottom dead center position or a position adjacent to the center, vacuum-sucking the component by the nozzle at the bottom dead center position or at the position adjacent to the center, and moving the component sucked by the nozzle to a predetermined position of a board after the vacuum-sucking.

A flat display device includes cathodes, a screen plate having a fluorescent screen, a plate-like electrode for controlling electron beams from the cathodes to the fluorescent screen, and a frame body for supporting the plate-like electrode. The frame body securely fixes both ends of the plate-like electrode at two opposite sides thereof, and has an elastic body for supporting the plate-like electrode in a stretched state by a spring force of the elastic body. The flat display device is made by the steps of pressing a pair of leaf springs provided respectively at two confronting sides of a frame body to thereby bend the frame body in such directions that the confronting sides become close to each other, securely fixing both ends of a plate-like electrode to the pair of bent leaf springs, and releasing the pressing of the leaf springs to thereby restore the leaf springs.

Flat display device and manufacturing method thereof

A method for fixing to a frame an electrode or a shadow mask for an image receiving tube. The method includes steps for stretching, in opposite directions, supporting ends of a rectangular mask plate having apertures formed between the supporting ends, in order to generate a tensile force having a uniform distribution over the entire surface of the plate. The method also includes pressing inwardly and bending a pair of elastic supporting elements, constituting two confronting sides of a frame, so that a distribution of the pressing force in a direction of each of the sides almost balances with a distribution of the tensile force. The supporting ends of the mask plate are then rigidly fixed to both of the bent supporting elements of the frame. The stretching and pressing forces applied to the mask plate and the frame are then released.

Growing community of inventors

Hirakata, Japan

Hideo Suzuki