Abstract: A circuit module includes a circuit substrate, at least one mount component, sealing bodies, and a shield. The circuit substrate includes a mount surface. The mount component is mounted on the mount surface. The sealing body is formed on the mount surface, covers the mount component and has a first sealing body section having a first thickness and a second sealing body section having a second thickness larger than the first thickness. The shield covers the sealing body and has a first shield section formed on the first sealing body section and having a third thickness and a second shield section formed on the second sealing body section and having a fourth thickness smaller than the third thickness. The sum of the fourth thickness and the second thickness equals to the sum of the first thickness and the third thickness.

Abstract: A circuit module includes: a wiring substrate including a mounting surface having first and second areas and a terminal surface on the other side of the mounting surface; a plurality of electronic components mounted on the first and second areas; a sealing layer that covers the plurality of electronic components, is formed of an insulation material, and includes a groove portion formed along a boundary between the first and second areas; a conductive shield including a first shield portion that covers an outer surface of the sealing layer and a second shield portion provided in the groove portion; and a conductive layer including a wiring portion that is provided on the mounting surface and electrically connects the terminal surface and the second shield portion, and a thickening portion that is provided in the wiring portion and partially thickens a connection area of the wiring portion with the second shield portion.

Abstract: Provided is a substrate with a built-in electronic component that can avoid as much as possible the occurrence of malfunctions in the electronic component due to moisture entering, even when an electronic component, provided with a structure in which a terminal pad is present where a hole in the sealing part provided on the main body of a component is located, is built into the substrate. A SAW filter 12 built into a substrate 11 is provided with a structure that has terminal pads 12c to 12e on the bottom of respective holes 12f1 in a sealing part 12f. The lower surfaces of respective conductive vias 11d2 are connected to the upper surfaces of the terminal pads 12c to 12e through the respective holes 12f1 such that a ring-shaped gap CC is formed between outer surfaces of the conductive vias 11d2 and inner surfaces of the holes 12f1. Each ring-shaped gap CC is filled with a part that is integral with a first insulating layer 11c.

Abstract: A circuit module pertaining to an embodiment of the present invention has a board, multiple electronic components, a shield member, sealing layer, and cover layer. The board has a mounting surface that includes a first area and second area in which the multiple electronic components are mounted. The shield member is constituted by conductive material and placed between the first area and second area on the mounting surface. The sealing layer has on its top surface a groove having its bottom face including an upper end face of the shield member, is formed on the mounting surface, and is constituted by an insulator that covers the multiple electronic components. The cover layer is constituted by conductive material and has a first cover part that fills the groove as well as a second cover part that covers the first cover part and sealing layer.

Abstract: Provided is a substrate with a built-in electronic component that can minimize occurrence of functional anomaly, damage, or the like in a filter function section of an elastic wave filter that is caused by a deformation of a hollow cover of the elastic wave filter that is built into the substrate. The substrate with a built-in electronic component includes: an SAW filter built into a substrate, a filter function section of the SAW filter being covered by a hollow cover; and a stress absorbing layer that faces the hollow cover of the SAW filter through an insulating layer in the substrate.

Abstract: In a multi-layer substrate including a core formed with a plurality of holes capable of containing an electronic part, a bottom insulating resin layer formed on a bottom surface of the core, a top insulating resin layer formed on a top surface of the core, a wiring layer selectively formed on an outer layer of the bottom insulating resin layer or top insulating resin layer, and an electronic part contained in the holes, both of the bottom and top insulating resin layers have a structure that is a combination of a resin which is changed to cohesiveness when heated and which undergoes smaller plastic deformation when heated to a higher temperature and an insulating resin layer which has a thickness sufficient to maintain insulation between the electronic part or a conductor of the core and the wiring layer and which inherently undergoes small plastic deformation, so that the electronic part can be securely and sealed in the holes without using a particular adhesive.

Abstract: An electronic part-incorporated multilayer substrate is provided. The multi-layer substrate includes a core formed with a plurality of holes capable of containing an electronic part, a bottom insulating resin layer formed on a bottom surface of the core, a top insulating resin layer formed on a top surface of the core, a wiring layer selectively formed on an outer surface of the bottom insulating resin layer or top insulating resin layer, and an electronic part contained in any of the holes. Both of the bottom and top insulating resin layers have a structure that is a combination of a resin which is changed to cohesiveness when heated and which undergoes smaller plastic deformation when heated to a higher temperature and an insulating resin layer which has a thickness sufficient to maintain insulation between the electronic part or a conductor of the core and the wiring layer and which inherently undergoes small plastic deformation.

Abstract: A semiconductor device comprises columnar electrodes including columnar portions and ball-shaped low-melting point layers joined to the top surfaces of columnar portions. The amount of plating of the low-melting point layer and the cross-sectional area of the columnar portion are adjusted in such a way that the relationship represented by A?1.3×B1.5 is satisfied, where the volume of each of the low-melting point layers is represented by A and the area of the top surface of each of the columnar portions is represented by B. Consequently, the low-melting point layer is prevented from trickling on a side surface of the columnar portion during formation of the ball by reflow of the low-melting point layer.