Abstract: A semiconductor device includes a substrate, a flowable dielectric material and a GaN-based semiconductor layer. The substrate has a pit exposed from an upper surface of the substrate, the flowable dielectric material fully fills the pit, and the GaN-based semiconductor layer is disposed over the substrate and the flowable dielectric material.

Abstract: A multimedia device fixture for automobiles is installed at the back of an automobile seat, and the related components of the automobile seat and fixture of the invention include a headrest, two headrest rods, and a back rest. The fixture includes a carrying stand having two left and right parallel corresponding parts, each including a middle fixing section and a lower fixing section connected to the bottom of the middle fixing section; an upper fixing section disposed at the top of the two corresponding parts and capable of being moved and fixed transversally; a flexible fixing member, surrounded and mounted onto the middle fixing section and the flexible fixing member of the headrest rod of the automobile seat. When the flexible fixing member is mounted onto the middle fixing section sand the headrest, the upper and lower fixing sections press the headrest and the backrest tightly.

Abstract: An interior automobile securing accessory with several holding positions, comprises a supporting member, which has a stopping section each on the top and bottom of the supporting member, respectively supporting the back of the headrest of the seat, and the back of the seat in the automobile; at least one hook, with one of its ends disposed on the supporting member and the other end coupled to the headrest and the headrest support tubes connected to the back of the seat; the hook can be adjusted in three directions such as the horizontal direction, vertical direction, and the direction extending from the supporting member to the headrest support tube within the range of the supporting member to securely couple the interior automobile accessory to the headrest support tube; at least a placing space disposed on the supporting member at the side other than the back of the seat for the user to place objects into it.