Abstract:
A semiconductor chip includes a semiconductor substrate that includes an upper surface and a lower surface opposite to the upper surface, a center pad disposed on a center portion of the upper surface and an edge portion disposes on an outer portion of the upper surface; a wiring structure that includes a wiring insulating layer disposed on a lower surface of the semiconductor substrate and a wiring pattern disposed in the wiring insulating layer and electrically connected to the semiconductor substrate; a first bump pad disposed on a first surface of the wiring structure and electrically connected to the wiring pattern; and a first connection bump that connects the first bump pad to an external device. The center pad has a regular octagon shape, and the edge pad has an extended octagon shape formed by extending squares from four non-continuous sides of a regular octagon.
Abstract:
A method of preparing polylactic acid by combining lactide with a main catalyst and cocatalyst, wherein the main catalyst includes an organometallic compound and a cocatalyst includes a nanoparticle; as well as a composition are provided.
Abstract:
A semiconductor package includes a semiconductor substrate, connection pads on a bottom surface of the semiconductor substrate, and connection bumps respectively on the connection pads, wherein the connection bumps include an extension bump and a non-extension bump, wherein the extension bump includes an extension seed layer on a respective one of the connection pads and a first conductive pillar on the extension seed layer, and wherein the extension seed layer longitudinally extends in a first extension direction.
Abstract:
A method of preparing polylactic acid by combining lactide with a main catalyst and cocatalyst, wherein the main catalyst includes an organometallic compound and a cocatalyst includes a nanoparticle; as well as a composition are provided.