Hangzhou Great Star Industrial Co., Ltd.

Hangzhou Great Star Tools Co., Ltd.

Silergy Semiconductor Technology (hangzhou) Ltd

Royal International Corp.

Jianping Qiu

Meng Wang

Yicheng Du

A semiconductor die can include: first, second, third, and fourth transistors disposed at intervals, where each two of the first, second, third, and fourth transistors are separated by a separation region to form four separation regions; an isolation structure having a first doping structure of a first doping type, and a second doping structure of a second doping type, to absorb hole carriers and electron carriers flowing between the first, second, third, and fourth transistors; where the first doping structure is located in the separation region to isolate adjacent transistors in the first, second, third, and fourth transistors; and where at least a portion of the second doping structure is surrounded by the first doping structure, and the second doping structure is separated from the first doping structure.

Semiconductor die

The invention discloses a utility knife preventing its blade from accidental detachment. Prior utility knives may lose constraint on the blade due to tilting of the retaining member when the blade receives external force from the blade holder pulling outward, causing the blade to detach accidentally from the blade holder. In the present invention, the line of the action force in the engagement area of blade and retaining member extends over the axis of axle pin where the retaining member is mounted, so that when the blade receives external force pulling it outward from the blade holder, a counterclockwise torque is formed to the retaining member to allow the retaining member constrain the blade more tightly and thus prevent the blade from accidental detachment.

Utility knife avoiding accidental detachment of blade

Pliers with adjustable jaw span have a first member () and a second member () which cooperate with each other. A long slot () is formed in the first member (). The second member () is connected with the first member () by means of a pivot () passing through the long slot (), and rotatable around the pivot () relative to the first member (), while adjusting the span of the jaws by varying the position of the pivot () within the long slot (). The edge of the long slot () is provided with ratchet teeth (). The pivot () is engaged with the ratchet teeth () by a pawl (), thus the pivot is movable within the long slot () in a first direction and immovable in a second direction which is opposite to the first direction. The pliers are convenient to operate because when the position of the pivot () is moved within the long slot (), the user's operation is required only for the movement in one direction.

Pliers with adjustable jaw span

A hand-operable and portable pencil sharpener which is comprised of a housing having a conical cavity therein. The cavity is of circular cross-section and defines an open inlet end tapering to a narrow inner end. A collar is provided about the open inlet end and formed integral with the housing. A pencil centering insert is rotatably secured in the collar by a flexible and removable snap ring. A slot is provided along the side wall of the conical cavity and a blade having a,sharp edge is secured adjacent to the slot with the sharp edge projecting slightly into the cavity whereby to shave a portion of the wood and lead on the extremity of a carpenter's pencil rotated in the conical cavity and centered by a centering slot in the pencil centering insert. An abrading element is secured to the housing to permit the abrading of a sharp point on the end of the lead.

Growing community of inventors

Hangzhou, China

Jianping Qiu