A transistor (2) and a matching circuit substrate (3-6) are provided on a base plate (1) and connected to each other. A frame (15) is provided on the base plate (1) and surrounds the transistor (2) and the matching circuit substrate (3-6). The frame (15) has a smaller linear expansion coefficient than that of the base plate (1). A screwing portion (17) is provided in the frame (15). A size of the base plate (1) is smaller than that of the frame (15).

A semiconductor structure includes a circuit substrate, a semiconductor die, and a cover. The semiconductor die is disposed on the circuit substrate. The cover is disposed over the semiconductor die and over the circuit substrate. The cover comprises a lid portion and a support portion. The structure includes a first adhesive bonding the support portion to the circuit substrate and a second adhesive bonding the support portion and the lid portion.

A semiconductor device includes a circuit substrate, a semiconductor package, and a metallic cover. The semiconductor package is disposed on the circuit substrate. The metallic cover is disposed over the semiconductor package and over the circuit substrate. The metallic cover comprises a lid and outer flanges. The lid overlies the semiconductor package. The outer flanges are disposed at edges of the lid, are connected with the lid, extend from the lid towards the circuit substrate, and face side surfaces of the semiconductor package. The lid has a first region that is located over the semiconductor package and is thicker than a second region that is located outside a footprint of the semiconductor package.

A semiconductor device includes a circuit substrate, a semiconductor package, and a metallic cover. The semiconductor package is disposed on the circuit substrate. The metallic cover is disposed over the semiconductor package and over the circuit substrate. The metallic cover comprises a lid and outer flanges. The lid overlies the semiconductor package. The outer flanges are disposed at edges of the lid, are connected with the lid, extend from the lid towards the circuit substrate, and face side surfaces of the semiconductor package. The lid has a first region that is located over the semiconductor package and is thicker than a second region that is located outside a footprint of the semiconductor package.

A transistor (2) and a matching circuit substrate (3-6) are provided on a base plate (1) and connected to each other. A frame (15) is provided on the base plate (1) and surrounds the transistor (2) and the matching circuit substrate (3-6). The frame (15) has a smaller linear expansion coefficient than that of the base plate (1). A screwing portion (17) is provided in the frame (15). A size of the base plate (1) is smaller than that of the frame (15).

A semiconductor device includes a circuit substrate, a semiconductor package, and a metallic cover. The semiconductor package is disposed on the circuit substrate. The metallic cover is disposed over the semiconductor package and over the circuit substrate. The metallic cover comprises a lid and outer flanges. The lid overlies the semiconductor package. The outer flanges are disposed at edges of the lid, are connected with the lid, extend from the lid towards the circuit substrate, and face side surfaces of the semiconductor package. The lid has a first region that is located over the semiconductor package and is thicker than a second region that is located outside a footprint of the semiconductor package.

An integrated circuit (IC) chip module includes a carrier, a stiffening frame, an IC chip, a first directional heat spreader, and a second directional heat spreader. Presented herein is a fabrication method that includes attaching the stiffening frame to the carrier. The stiffening frame includes a central opening, a base portion, a first pair of opposing sidewalls, and a second pair of opposing sidewalls. The method includes electronically coupling the semiconductor chip to the carrier concentrically arranged within the central opening. The method includes thermally contacting the first directional heat spreader to the semiconductor chip. The first directional heat spreader transfers heat from the semiconductor chip towards the first pair of opposing sidewalls. The method includes thermally contacting the second directional heat spreader to the first directional heat spreader. The second directional heat spreader transfers heat from the first directional heat spreader towards the second pair of opposing sidewalls.

A method includes electrically connecting an IC chip module to a motherboard and thermally contacting a heat sink to the IC chip module. The IC chip module includes a carrier comprising a top surface and a bottom surface configured to be electrically connected to the motherboard. The IC chip module includes a stiffening frame attached to the carrier top surface. The stiffening frame includes a base portion that has a central opening and a plurality of opposing sidewalls. The IC chip module further includes a semiconductor chip electrically connected to the carrier top surface and concentrically arranged within the central opening. The IC chip module further includes a first directional heat spreader thermally contacting the semiconductor chip. The first directional heat spreader includes a directionally thermally conductive material arranged to efficiently transfer heat from the semiconductor chip in a first opposing bivector direction towards first opposing sidewalls.

An electronic device includes an embedded die frame having a cavity and a routing structure, a semiconductor die in the cavity with a gallium nitride layer on the routing structure, and a heat spreader having a thermally conductive insulator layer and a metal plate, the thermally conductive insulator layer having a first side that faces the embedded die frame and an opposite second side that faces away from the embedded die frame, with a portion of the first side of the thermally conductive insulator layer extending over a side of a silicon substrate of the semiconductor die, and the metal plate on the second side of the thermally conductive insulator layer.

An integrated circuit (IC) chip module includes a carrier, a stiffening frame, an IC chip, and a first directional heat spreader. A second directional heat spreader may further be arranged orthogonal to the first directional heat spreader. The carrier has a top surface and a bottom surface configured to be electrically connected to a motherboard. The stiffening frame includes an opening that accepts the IC chip and may be attached to the top surface of the carrier. The IC chip is concentrically arranged within the opening of the stiffening frame. The first directional heat spreader is attached to the stiffening frame and to the IC chip and generally removes heat in a first opposing bivector direction. When included in the IC chip module, the second directional heat spreader is attached to the stiffening frame and to the first directional heat spreader and generally removes heat in a second opposing bivector direction orthogonal to the first opposing bivector direction.