An integrated circuit assembly that includes a semiconductor wafer having a first coefficient of thermal expansion; an electronic circuit substrate having a second coefficient of thermal expansion that is different than the first coefficient of thermal expansion; and an elastomeric connector arranged between the semiconductor wafer and the electronic circuit substrate and that forms an operable signal communication path between the semiconductor wafer and the electronic circuit substrate.

The present invention provides to a wearable smart device having electrical wiring comprising a stretchable conductive composition having excellent in durability such as repeated bending properties and repeated twisting properties, a material for realizing the wearable smart device, and a method for producing the wearable start device. An electrical wiring including a fine line having an electrical line interval of 1 mm or less, preferably the line width of less than 1 mm, is formed by printing a paste for forming a stretchable conductor containing metal-based conductive particles and a non-crosslinked elastomer, and further dried and cured at a low temperature condition of 120 C. for 30 minutes. As a result, the wearable smart device having electrical wiring constituted by fine lines without sagging of the edge is obtained.

A flexible electrode is provided in which an increase in resistance change rate caused by repeated stretch is reduced. A sensor element is also provided, which uses the flexible electrode. A strain sensor, a pressure sensor, and a temperature sensor are also provided, each using the sensor element. The flexible electrode can include an insulating flexible substrate and an electrode film laminated on the flexible substrate. The electrode film can include a fibrous carbon nanohorn aggregate.

This invention relates to a curable adhesive composition. In particular, the present invention relates to a curable adhesive composition for die attach, which eliminates the void issue, minimizes the fillet, and has lower bond line thickness and tilt trend, when cured.

A plate-shaped multilayer wiring substrate includes at least two resin layers stacked on top of each other and each including an insulating base and a conductive pattern provided on the insulating base, and a front surface layer joined onto the resin layers stacked. The front surface layer has a higher elastic modulus than an elastic modulus of the insulating bases. A joint interface between the resin layers and the front surface layer includes projections and depressions. Also, a method for manufacturing the plate-shaped multilayer wiring substrate includes a step of stacking, on top of resin layers, a front surface layer having a higher elastic modulus than an elastic modulus of the resin layers, and a step of performing pressing under pressure from above the front surface layer by using a flat surface in a heated state to join the resin layers and the front surface layer.

A stretchable circuit substrate includes: a base material being stretchable; a wiring which is on a first surface side of the base material, and which includes a bellows-like member including a plurality of ridges and recesses arranged in a first direction which is one of in-plane directions in the first surface of the base material; and an adjustment layer which includes the bellows-like member and is on the first surface side of the base material so as to at least overlap, in a plan view, a wiring region in which the wiring is positioned; wherein the adjustment layer has a Young's modulus smaller than a Young's modulus of the wiring.

A carrier structure is provided. A spacer is formed in an insulation board body provided with a circuit layer, and is not electrically connected to the circuit layer. The spacer breaks the insulation board body, and a structural stress of the insulation board body will not be continuously concentrated on a hard material of the insulation board body, thereby preventing warpage from occurring to the insulation board body.

A semi-flex component carrier includes a stack with at least one electrically insulating layer structure and/or at least one electrically conductive layer structure. The stack defines at least one rigid portion and at least one semi-flexible portion, and a component embedded in the at least one rigid portion. The at least one electrically insulating layer structure of the stack has a mechanical buffer structure surrounding at least part of the component and has a lower value of the Young modulus than other electrically insulating material of the stack.

A printed circuit board has a first base region and a flexible region. The printed circuit board includes a core layer including a first insulating layer including a high elastic material and a first wiring layer disposed on the first insulating layer; a first build-up layer disposed on the core layer in the first base region, and including a second insulating layer including a low elastic material, and having a first through portion penetrating through the second insulating layer; and a first electronic component disposed in the first through portion and connected to the first wiring layer.

A system and method for fabricating an orifice in a multi-layered semiconductor substrate and singulation of the semiconductor substrate includes adding a sacrificial layer of material to a first surface of a semiconductor substrate; subsequently, removing a first radius of a first depth of material from the semiconductor substrate along a direction normal to the first surface, the removal of the first depth of material uses a first removal technique that removes the first depth of material; and removing a second radius of a second depth of material from the semiconductor substrate along the direction normal to the first surface based on the removal of the first depth of material, the removal of the second depth of material uses a second removal technique.