Abstract: A photo resist layer is used to protect a dielectric layer and conductive elements embedded in the dielectric layer when patterning an etch stop layer underlying the dielectric layer. The photo resist layer may further be used to etch another dielectric layer underlying the etch stop layer, where etching the next dielectric layer exposes a contact, such as a gate contact. The bottom layer can be used to protect the conductive elements embedded in the dielectric layer from a wet etchant used to etch the etch stop layer.

Abstract: A structure for preventing the formation of a dead point for a cam wheel includes a driving wheel with a pressing portion provided at one side thereof for pushing a pushed portion of the cam wheel. When the cam wheel is moved over a distance while rotating simultaneously, a cam portion of the cam wheel pushes one end of the swinging piece. When the one end of the swinging piece is pushed to be apart from the outer periphery of the cam wheel, a restoring piece axially pushes the cam wheel back to its original position. A strapping device includes the above structure, a housing, a first transmission assembly, a second transmission assembly and a third transmission assembly. Tensioning of a circular strap, rapid friction bonding and cutting are sequentially performed by the transmissions of the first to third assemblies, respectively.

Abstract: A structure for preventing the formation of a dead point for a cam wheel includes a driving wheel with a pressing portion provided at one side thereof for pushing a pushed portion of the cam wheel. When the cam wheel is moved over a distance while rotating simultaneously, a cam portion of the cam wheel pushes one end of the swinging piece. When the one end of the swinging piece is pushed to be apart from the outer periphery of the cam wheel, a restoring piece axially pushes the cam wheel back to its original position. A strapping device includes the above structure, a housing, a first transmission assembly, a second transmission assembly and a third transmission assembly. Tensioning of a circular strap, rapid friction bonding and cutting are sequentially performed by the transmissions of the first to third assemblies, respectively.

Abstract: A rocker assembly of a strapping machine has a rocker having a seat, a positioning panel mounted on the seat and being able to swing, and two teeth panels slidably mounted on the positioning panel. When a fixed end and a tightening end of a wrapping strap are mounted between the rocker assembly and a tensioning wheel, the teeth panels slide and the positioning panel swings to adjust engaging surfaces and engaging forces between the teeth panels and the wrapping strap according to thickness of the wrapping strap. Thus the wrapping strap is able to securely wrap around the goods and is not scratched.

Abstract: A rocker assembly of a strapping machine has a rocker having a seat, a positioning panel mounted on the seat and being able to swing, and two teeth panels slidably mounted on the positioning panel. When a fixed end and a tightening end of a wrapping strap are mounted between the rocker assembly and a tensioning wheel, the teeth panels slide and the positioning panel swings to adjust engaging surfaces and engaging forces between the teeth panels and the wrapping strap according to thickness of the wrapping strap. Thus the wrapping strap is able to securely wrap around the goods and is not scratched.