Abstract: There is provided a method of fabricating an electronic device including flip-chip mounting a device chip on a substrate, and supplying solder between adjacent device chips by supplying the solder on the device chips and applying heat and pressure on the solder, and a contact angle of the device chip and the solder is greater than 90° with the solder melted.

Abstract: A surface acoustic wave device is enable to prevent electrode erosion, without any specific environmental process. The surface acoustic wave device includes a piezoelectric substrate, an electrode for the formation of surface acoustic wave, being formed on the piezoelectric substrate, on the piezoelectric substrate, a frame-shaped layer surrounding the electrode for the formation of surface acoustic wave, and a lid body formed on the frame-shaped layer by bonding, so as to form a hollow portion between the lid body and the electrode for the formation of surface acoustic wave. The frame-shaped layer and the lid body include photosensitive resin, and the lid body includes a through hole, and the through hole is sealed with a halogen-free thermosetting resin.

Abstract: A method of manufacturing an acoustic wave device includes forming a first sealing portion on a substrate having an acoustic wave element thereon so that a functional region, in which an acoustic wave oscillates, of the acoustic wave element acts as a first non-covered portion and a cutting region for individuating acts as a second non-covered portion, forming a second sealing portion on the first sealing portion so as to cover the first non-covered portion and the second non-covered portion, and cutting off the substrate and the second sealing portion so that the second non-covered portion is divided.

Abstract: An electronic device includes a package substrate made of an insulator, a device chip that is flip-chip mounted on the package substrate, and a seal portion sealing the device chip. The seal portion includes sidewalls made of solder. The whole seal portion including the sidewalls may be made of solder. The electronic device may include a metal layer provided on the seal portion.

Abstract: A surface acoustic wave device is enable to prevent electrode erosion, without any specific environmental process. The surface acoustic wave device includes a piezoelectric substrate, an electrode for the formation of surface acoustic wave, being formed on the piezoelectric substrate, on the piezoelectric substrate, a frame-shaped layer surrounding the electrode for the formation of surface acoustic wave, and a lid body formed on the frame-shaped layer by bonding, so as to form a hollow portion between the lid body and the electrode for the formation of surface acoustic wave. The frame-shaped layer and the lid body include photosensitive resin, and the lid body includes a through hole, and the through hole is sealed with a halogen-free thermosetting resin.

Abstract: A method of manufacturing an acoustic wave device includes forming a first sealing portion on a substrate having an acoustic wave element thereon so that a functional region, in which an acoustic wave oscillates, of the acoustic wave element acts as a first non-covered portion and a cutting region for individuating acts as a second non-covered portion, forming a second sealing portion on the first sealing portion so as to cover the first non-covered portion and the second non-covered portion, and cutting off the substrate and the second sealing portion so that the second non-covered portion is divided.

Abstract: There is provided a method of fabricating an electronic device including flip-chip mounting a device chip on a substrate, and supplying solder between adjacent device chips by supplying the solder on the device chips and applying heat and pressure on the solder, and a contact angle of the device chip and the solder is greater than 90° with the solder melted.

Abstract: A package for an electronic device includes a cavity that houses an electronic element, and grooves or holes formed on or in sidewalls that define the cavity. The grooves or holes extend from an open side of the cavity so as not to reach a bottom side of the package.

Abstract: A surface acoustic wave device has a SAW device element 10 and a package 20 housing the SAW device element. The package includes a resin substrate 20 having metal patterns 21 and 22 formed on both surfaces thereof, and a resin cap 32. The SAW device element is mounted on one of the metal patterns of the resin substrate. The resin cap is adhered to the resin substrate to cover the SAW device element. The surfaces of the resin substrate are flush with corresponding end surfaces of the resin cap.

Abstract: An electronic device includes a package substrate made of an insulator, a device chip that is flip-chip mounted on the package substrate, and a seal portion sealing the device chip. The seal portion includes sidewalls made of solder. The whole seal portion including the sidewalls may be made of solder. The electronic device may include a metal layer provided on the seal portion.

Abstract: A surface acoustic wave device has a SAW device element 10 and a package 20 housing the SAW device element. The package includes a resin substrate 20 having metal patterns 21 and 22 formed on both surfaces thereof, and a resin cap 32. The SAW device element is mounted on one of the metal patterns of the resin substrate. The resin cap is adhered to the resin substrate to cover the SAW device element. The surfaces of the resin substrate are flush with corresponding end surfaces of the resin cap.

Abstract: A package for an electronic device includes a cavity that houses an electronic element, and grooves or holes formed on or in sidewalls that define the cavity. The grooves or holes extend from an open side of the cavity so as not to reach a bottom side of the package.

Abstract: This invention relates to an acoustic surface wave device suitably used in a high-frequency circuit, in which high attenuation characteristics are provided.The present invention includes an acoustic surface wave element, a ceramic package having a ceramic substrate of a multi-layer structure, the ceramic substrate having a die-attach portion on which the acoustic surface wave element is mounted, the ceramic package having an input terminal and an output terminal connected to the acoustic surface wave element, the ceramic package having an opening located above the ceramic substrate, each of the input terminal and the output terminal having a ground terminal, and a metallic cap sealing the opening of the ceramic package. The metallic cap is electrically connected to one of the ground terminal of the input terminal and the ground terminal of the output terminal.

Abstract: A piezoelectric element package includes a chip carrier having a shielding surface and a cavity for enclosing a piezoelectric element therein, and a cap having a central axis and a shielding material on a bottom surface of the cap, the cap shielding the piezoelectric element, enclosed in the cavity of the chip carrier, with the shielding material bonded to the shielding surface of the chip carrier. The cap is in a substantially circular shape and the shielding material of the cap and the shielding surface of the chip carrier are bonded to each other such that a bonding area between the shielding material and the shielding surface is unchanged.