This method for producing a structure wherein base materials are bonded by atomic diffusion comprises: a step for applying a liquid resin on the base material; a step for smoothing the surface of the liquid resin by surface tension; a step for forming a resin layer by curing; a step for forming a metal thin film on the resin layer; a step for forming a metal thin film on the base material; and a step for bringing the metal thin film of the base material and the metal thin film of the base material into close contact with each other, thereby bonding the metal thin film of the resin layer and the metal thin film of the base material with each other by atomic diffusion.

A method for selectively adhering braze powders to a surface comprises applying a braze powder to a surface, and then directing a laser beam onto the braze powder while the laser beam moves along a predetermined path relative to the surface. The laser beam selectively heats the braze powder along the predetermined path such that the braze powder is sintered and bonded to the surface. Thus, a braze deposit is formed at one or more predetermined locations on the surface. After forming the braze deposit, excess braze powder, that is, the braze powder not selectively heated by the laser, is removed from the surface.

According to the present invention, there is provided a copper/ceramic bonded body including: a copper member made of copper or a copper alloy; and a ceramic member made of silicon-containing ceramics, the copper member and the ceramic member being bonded to each other, in which a maximum indentation hardness in a region is set to be in a range of 70 mgf/μm.sup.2 or more and 150 mgf/μm.sup.2 or less, the region being from 10 μm to 50 μm with reference to a bonded interface between the copper member and the ceramic member toward the copper member side.

A method for joining two components of a meltable material comprises the steps of providing a first component having a first border region and a second component having a second border region, placing the second component relative to the first component so as to form an overlap between the first border region and the second border region under a gap between the first border region and the second border region, continuously heating opposed sections of the first border region and the second border region at the same time through at least one energy source arranged in the gap at least partially, continuously providing a relative motion of the at least one energy source along the first border region and the second border region in the gap, and continuously pressing already heated sections of the first border region and the second border region onto each other.

An ultrasound horn is provided which vibrates a bonding tool, attached at a tip, in a plurality of directions with a simple structure. There is provided an ultrasound horn having: a longitudinal vibration generator; a horn portion; and a torsional vibration generator. The torsional vibration generator includes a body including a polygonal pillar portion, second layered elements in which a plurality of second piezoelectric elements are layered, and which are attached to side surfaces of the polygonal pillar portion, weights, and a pressure application ring which applies a pressure by pressing the second piezoelectric elements against the polygonal pillar portion via the weights.

Provided is a multimaterial joint material that contributes to multimaterialization and a reduction in weight of a transport apparatus, the multimaterial joint material being configured from: a flame-retardant magnesium alloy; and a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel. This multimaterial joint material is such that two or more layers of different types of metal materials are joined, wherein the multimaterial joint material is characterized in that: of the two or more layers of metal materials, at least one layer comprises a flame-retardant magnesium alloy, and another layer comprises a metal or alloy selected from the group consisting of aluminum alloys, titanium alloys, stainless steel, and steel; and the two or more layers of metal materials are joined together across the entire surface of joining surfaces that overlap each other.

A two-piece connection between a supply pipe from a source of water and a connection to a fire sprinkler with the connector having a first or rear section entirely above a ceiling and a second or front section connected to the first section with the connection entirely above a ceiling and the forward portion of second section connected to the fire sprinkler. The first connector section, located entirely above a ceiling, has a spherical male sidewall with a rounded leading edge and a rear portion of the second connector section has a spherical female interior surface.

A method for forming a bonding structure is provided, including providing a first metal, wherein the first metal has a first absolute melting point. The method includes forming a silver nano-twinned layer on the first metal. The silver nano-twinned layer includes parallel-arranged twin boundaries. The parallel-arranged twin boundaries include 90% or more [111] crystal orientation. The method includes oppositely bonding the silver nano-twinned layer to a second metal. The second metal has a second absolute melting point. The bonding of the silver nano-twinned layer and the second metal is performed at a temperature of 300° C. to half of the first absolute melting point or 300° C. to half of the second absolute melting point.

A method for forming a bonding structure is provided, including providing a first metal, wherein the first metal has a first absolute melting point. The method includes forming a silver nano-twinned layer on the first metal. The silver nano-twinned layer includes parallel-arranged twin boundaries. The parallel-arranged twin boundaries include 90% or more [111] crystal orientation. The method includes oppositely bonding the silver nano-twinned layer to a second metal. The second metal has a second absolute melting point. The bonding of the silver nano-twinned layer and the second metal is performed at a temperature of 300° C. to half of the first absolute melting point or 300° C. to half of the second absolute melting point.

An ultrasonic wave is applied to an upper surface of an ingot via a liquid layer, in a state in which an outer circumferential region of a lower surface of the ingot is sucked. A lower side around an outer circumferential arc-shaped portion of the lower surface of the ingot is open so that liquid that serves as a medium of the ultrasonic wave does not collect around the outer circumferential arc-shaped portion of the lower surface of the ingot. As a result, a peel-off layer formed in the ingot is not immersed in liquid when an ultrasonic wave is applied to the upper surface of the ingot via the liquid layer. Consequently, even when the ingot becomes thin, the ingot can be separated at the peel-off layer, and a wafer can be peeled off from the ingot.