A wiring board includes a first interconnect layer, a first insulating layer covering the first interconnect layer, a second interconnect layer, thinner than the first interconnect layer, formed on the first insulating layer and having an interconnect density higher than that of the first interconnect layer, and a second insulating layer formed on the first insulating layer and covering the second interconnect layer. The first insulating layer includes a first layer including no reinforcing material, and a second layer including a reinforcing material. The first and second layers include a non-photosensitive thermosetting resin as a main component thereof. The first layer has a coefficient of thermal expansion higher than that of the second layer, and the second insulating layer includes a photosensitive resin as a main component thereof. The second interconnect layer includes an interconnect formed directly on and electrically connected to the first interconnect layer.

Provided is a printed wiring board comprising: a substrate; a conductive layer including a land and a wiring and formed on a surface of the substrate, the wiring having a width smaller than the land and drawn from the land; and an insulating layer formed on the conductive layer. The insulating layer has an opening corresponding to a position of the land, and an edge of the opening runs above the land and above one of edges in a width direction of the wiring.

The present disclosure relates to optical systems and methods of their manufacture. An example system includes a printed circuit board assembly (PCBA) and an image sensor package coupled to the PCBA by way of a plurality of bond members. The system additionally includes a sensor holder coupled to the PCBA. The image sensor package and the sensor holder are coupled to the PCBA so as to minimize thermally-induced stresses in at least one of: the plurality of bond members, the PCBA, the sensor holder, or the image sensor package.

A circuit carrier board structure includes a first substrate, a second substrate, an adhesive layer, and a plurality of contact pads. The first substrate includes a first surface and a second surface, and also includes a plurality of first build-up layers sequentially stacked. The first build-up layers include a first dielectric layer and a first circuit layer. The second substrate includes a third surface and a fourth surface, and also includes a plurality of second build-up layers sequentially stacked. The second build-up layers include a second dielectric layer and a second circuit layer. The second surface is combined to the third surface. The connection pads are on the first surface and electrically connected to the first circuit layer. The first substrate is electrically connected to the second substrate. A manufacturing method of the circuit carrier board structure is also provided.

A method for manufacturing a semiconductor device, for example formed utilizing component stacking. As non-limiting examples, various aspects of this disclosure provide a method for reducing warpage and/or stress in stacked semiconductor devices.

A composite substrate structure includes a circuit substrate, a first anisotropic conductive film, a first glass substrate, a dielectric layer, a patterned circuit layer and a conductive via. The first anisotropic conductive film is disposed on the circuit substrate. The first glass substrate is disposed on the first anisotropic conductive film and has a first surface and a second surface opposite to the first surface. The first glass substrate includes a first circuit layer, a second circuit layer and at least one first conductive via. The first circuit layer is disposed on the first surface. The second circuit layer is disposed on the second surface. The first conductive via penetrates the first glass substrate and is electrically connected to the first circuit layer and the second circuit layer. The first glass substrate and the circuit substrate are respectively located on two opposite sides of the first anisotropic conductive film.

A ceramic circuit board includes a ceramic substrate and metal layers provided to both surfaces of the ceramic substrate and containing Al and/or Cu, wherein a measurement value 1 of a linear thermal expansion coefficient at 25 C. to 150 C. is 510.sup.6 to 910.sup.6/K, a ratio 1/2 of the 1 to a theoretical value 2 of the linear thermal expansion coefficient at 25 C. to 150 C. is 0.7 to 0.95, and at least one of the metal layers forms a metal circuit.

A circuit board includes: a ceramic substrate that has a first surface and a second surface; a first metal part that has a first metal plate joined to the first surface and a protrusion projecting from a front surface of the first metal plate; and a second metal part that has a second metal plate joined to the second surface. When the ceramic substrate is equally divided into first to third sections along a longer side direction, V.sub.1, V.sub.2, V.sub.3, V.sub.4, V.sub.5, and V.sub.6 are numbers satisfying formula V.sub.4/V.sub.1+V.sub.6/V.sub.32(V.sub.5/V.sub.2), 0.5V.sub.4/V.sub.12, 0.5V.sub.5/V.sub.22, and 0.5V.sub.6/V.sub.32.

Systems and/or techniques associated with active control of electronic package warpage are provided. In one example, a system includes an electronic package and an integrated circuit. The electronic package includes a patterned structural material associated with a mechanical characteristic that changes in response to an applied condition. The integrated circuit controls the applied condition associated with the patterned structural material based on sensor data associated with a status of the electronic package.

A multilayer printed wiring board includes a core substrate, a first buildup layer, and a second buildup layer. The first buildup layer includes a first insulating layer and a first conductor layer alternately laminated with each other. The second buildup layer includes a second insulating layer and a second conductor layer alternately laminated with each other. The core substrate, the first insulating layer, and the second insulating layer each include a glass cloth. The glass cloth is woven with warp threads and weft threads. The warp threads each have a width narrower a width of each of the weft threads. Each of the warp threads constituting the glass cloth in the first insulating layer and the second insulating layer both lying adjacent to the core substrate is arranged perpendicular to each of the warp threads constituting the glass cloth in the core substrate.