Abstract: A pair of optical components is used in an isolator that enables electric isolation. Each of the optical components includes: first lens portions arranged on different optical paths and transmitting light in a first direction; second lens portions arranged on different optical paths and transmitting light in the second direction orthogonal to the first direction; and a reflection portion reflecting, in the second direction, the light in the first direction transmitted through the first lens portion and guiding the light to the second lens portion, or reflecting, in the first direction, the light in the second direction transmitted through the second lens portion and guiding the light to the first lens portion The second lens portion included in one of the pair of optical components and the second lens portion included in the other optical component are spaced apart from each other and face each other.

Abstract: A pair of optical components is used in an isolator that enables electric isolation. Each of the optical components includes: first lens portions arranged on different optical paths and transmitting light in a first direction; second lens portions arranged on different optical paths and transmitting light in the second direction orthogonal to the first direction; and a reflection portion reflecting, in the second direction, the light in the first direction transmitted through the first lens portion and guiding the light to the second lens portion, or reflecting, in the first direction, the light in the second direction transmitted through the second lens portion and guiding the light to the first lens portion The second lens portion included in one of the pair of optical components and the second lens portion included in the other optical component are spaced apart from each other and face each other.

Abstract: The present invention provides a submount which includes a semiconductor element and which can be easily connected to an IC on a main substrate. The submount in one embodiment of the present invention includes: a substrate; electrodes; the semiconductor element; Au wires; and gold bumps. The electrodes, the semiconductor element, the Au wires, and the gold bumps, are encapsulated on the substrate by a resin. The gold bumps are formed on the electrodes and the Au wires by ball bonding and are cut by dicing such that side surfaces of the gold bumps are exposed. The exposed surfaces function as side surface electrodes of the submount.

Abstract: In manufacturing a submount, a first electrode layer (12) is formed as a layer on the surface of a submount substrate (11); a side surface (122) of the first electrode layer (12) is formed on substantially the same plane as a side surface (112) of the submount substrate (11); and the side surface (122) of the first electrode layer (12) is a connection surface for creating an electrical connection with the first electrode layer (12). By making the first electrode layer (12) sufficiently thick, the surface area of the side surface (122) can be made sufficiently large to allow, for example, wire bonding using the side surface (122). Further, components such as an optical element (14) can be protected by a sealing material (16).

Abstract: In manufacturing a submount, a first electrode layer (12) is formed as a layer on the surface of a submount substrate (11); a side surface (122) of the first electrode layer (12) is formed on substantially the same plane as a side surface (112) of the submount substrate (11); and the side surface (122) of the first electrode layer (12) is a connection surface for creating an electrical connection with the first electrode layer (12). By making the first electrode layer (12) sufficiently thick, the surface area of the side surface (122) can be made sufficiently large to allow, for example, wire bonding using the side surface (122). Further, components such as an optical element (14) can be protected by a sealing material (16).

Abstract: In order to simplify submount manufacture, and increase the manufacturing efficiency thereof, a first electrode layer (12) is formed as a layer on the surface of a submount substrate (11); a side surface (122) of the first electrode layer (12) is formed on substantially the same plane as a side surface (112) of the submount substrate (11); and the side surface (122) of the first electrode layer (12) is a connection surface for creating an electrical connection with the first electrode layer (12). By making the first electrode layer (12) sufficiently thick, the surface area of the side surface (122) can be made sufficiently large. This allows, for example, wire bonding using this side surface (122). Further, components such as an optical element (14) can be protected by a sealing material (16).

Abstract: There are provided a signal transmission device capable of improving a production efficiency and reducing a production cost, and a manufacturing method thereof. A spacer 4 is interposed between peripheral surface portions 101a of optical waveguides 101 exposed by an optical waveguide exposure section 5 and a rear surface 115 of an optical module substrate 105. A height of the spacer 4 alone allows an optical element 103 of the optical module substrate 105 to be positioned so high that this optical element 103 can actually face optical waveguide end surfaces 109. Therefore, it is not required that the spacer be individually manufactured per signal transmission device. Further, there can be avoided individual length measurements of distances such as a distance L2 between a surface 2a of a base platform 2 and the peripheral surface portions 101a of the optical waveguides 101, or the like.

Abstract: The present invention provides technology for mounting components with simple processing and with comparatively high dimensional precision. Welding sections (21) and non-welding sections (31) are formed on a surface of a substrate (1) by transferring a mask pattern. Next, fusing material (4) is arranged on the welding sections (21), and the fusing material (4) is fused to the welding sections (21). The fusing material (4) is positioned with comparatively high dimensional precision using the non-welding sections (31). Next, a component (5) is mounted on the substrate (1) with the fusing material (4) that has been fused to the welding sections (21) as positioning guides. In this way, it is possible to mount the component (5) on the substrate (1) with high dimensional precision.