Abstract: A method includes implanting impurities in a semiconductor substrate to form an etch stop region within the semiconductor substrate; forming a transistor structure on a front side of the semiconductor substrate; forming a front-side interconnect structure over the transistor structure; performing a thinning process on a back side of the semiconductor substrate to reduce a thickness of the semiconductor substrate, wherein the thinning process is slowed by the etch stop region; and forming a back-side interconnect structure over the back side of the semiconductor substrate.

Abstract: A push-type nozzle assembly includes a cylinder, a check valve, a plunger, a piston, a spring, a rotating member, a locking member, an upper push rod, a suction valve and a push head. When pushing the push head downward, and the outer chamber contact the locking member, the liquid in the cylinder is pushed out. When releasing the push head, the piston moves back by the spring to create a vacuum suction force to suck the liquid left in the nozzle back. When the outer chamber locks with the locking member, the bottom end of the piston rod seals the plunger to seal the cylinder so as to prevent leakage. When the outer chamber is separated from the locking member, the upper push rod seals the suction valve to avoid liquid from leakage. The inlet valve avoids the liquid from being accumulated in the cylinder and the top of the piston.

Abstract: A quantitative pressing sprayer includes a clamping plate, a pressing head, and a hand-held screw cap connected with a container. The pressing head penetrates through the hand-held screw cap. The clamping plate is pressed against and arranged on the pressing head. An end of the clamping plate is used as a fixed end that is connected with the hand-held screw cap. Another end of the clamping plate is used as a pressed end. The clamping plate drives the pressing head with the fixed end as a pivot of a lever. The pressed end and the fixed end form a first arm, the pressing head and the fixed end form a second arm, and the first arm is longer than the second arm.

Abstract: A push-type nozzle assembly includes a cylinder, a check valve, a plunger, a piston, a spring, a rotating member, a locking member, an upper push rod, a suction valve and a push head. When pushing the push head downward, and the outer chamber contact the locking member, the liquid in the cylinder is pushed out. When releasing the push head, the piston moves back by the spring to create a vacuum suction force to suck the liquid left in the nozzle back. When the outer chamber locks with the locking member, the bottom end of the piston rod seals the plunger to seal the cylinder so as to prevent leakage. When the outer chamber is separated from the locking member, the upper push rod seals the suction valve to avoid liquid from leakage. The inlet valve avoids the liquid from being accumulated in the cylinder and the top of the piston.

Abstract: A spray head assembly includes a press head, a nozzle, a plunge, a movable member and a resilient member. The press head has a space, a first connection portion and a press end. The nozzle is connected to the press head and has a second connection portion connected to the first connection portion. The plunge is inserted in an outlet of the nozzle has a seal end and a third connection portion. The movable member is located in the space and connected to the plunge. The movable member has a fourth connection portion which is connected to the third connection portion. The movable member is pushed by liquid. The resilient member is mounted to the tubular portion and biased between the restriction portion and push portion. When the press end is pushed, the liquid pushes the movable member so as to move the plunge to open the outlet.

Abstract: A spray head assembly includes a press head, a mount, a netted member, an air valve, a first piston, a rod, a main part, a resilient member, a restriction member, a second piston, a vale, a cylinder and an urging member. The press head is connected with the air valve which is connected to the netted member, the first piston and the second piston on one end of the rod and main part. The rod extends through the main part and is located in the cylinder. The valve is engaged with an opening of the cylinder. The mount and the cylinder are connected to each other. Liquid and air are mixed to generate fine foam which is obtain from the press head.

Abstract: A spray head assembly includes a tubular cylinder having a separation board transversely connected therein and a through hole is defined centrally through the separation board. A space is defined in the cylinder and communicates with the through hole. A check valve is located in the space and has a check rod which extends through the through hole. A piston rod is located in the cylinder and a spring is mounted to the piston rod. A cover is connected to the cylinder and a locking member. The piston rod extends through the locking member. A push tube extends through the locking member and communicates with the cylinder. A movable member is located in the push tube which is connected to a press head. A nozzle extends outward from the press head. The spray head is water-proof and the amount liquid remained in the nozzle can be sucked back after use.

Abstract: A spray head assembly includes a tubular cylinder having a separation board transversely connected therein and a through hole is defined centrally through the separation board. A space is defined in the cylinder and communicates with the through hole. A check valve is located in the space and has a check rod which extends through the through hole. A piston rod is located in the cylinder and a spring is mounted to the piston rod. A cover is connected to the cylinder and a locking member. The piston rod extends through the locking member. A push tube extends through the locking member and communicates with the cylinder. A movable member is located in the push tube which is connected to a press head. A nozzle extends outward from the press head. The spray head is water-proof and the amount liquid remained in the nozzle can be sucked back after use.

Abstract: A spray head assembly includes a press head, a mount, a netted member, an air valve, a first piston, a rod, a main part, a resilient member, a restriction member, a second piston, a vale, a cylinder and an urging member. The press head is connected with the air valve which is connected to the netted member, the first piston and the second piston on one end of the rod and main part. The rod extends through the main part and is located in the cylinder. The valve is engaged with an opening of the cylinder. The mount and the cylinder are connected to each other. Liquid and air are mixed to generate fine foam which is obtain from the press head.

Abstract: A mascara wand assembly includes a wand, multiple brush units and a cylindrical brush unit. The wand has a cap and a handle on two ends thereof. The cylindrical brush unit is connected to the cap. The multiple brush units are mounted to the wand and each brush unit has multiple first brush hairs extending radially and outward therefrom. The first brush hairs have different thicknesses. Each first brush hair has multiple sub-brush hairs extending therefrom. Each brush unit has a notch and a block respectively on the top and underside thereof. A 90-degree angle is defined between the notch and block of each brush unit. The block of one brush unit is engaged with the notch of the next brush unit.

Abstract: The cylinder assembly includes a first body, a second body and a coupling mechanism. The first body is of a tubular shape and has a valve set at a bottom end thereof. The valve set includes a valve, an elastomer and a passage. The second body has a ring with an outline fitting the valve. The coupling mechanism includes a first coupling piece disposed on the first body and a second coupling piece disposed on the second body and is used for detachably coupling the first and second bodies. The valve is located in an aperture of the ring, the elastomer flexibly supports the valve to abut against the ring and seal up the aperture or retracts to open the aperture for allowing liquid to flow into the first body through the passage.

Abstract: A spray head assembly includes a press head, a seal member, a push tube, a piston unit, a resilient member, a cylinder unit, a valve and a mount. The press head has an annular face and a first locking portion. The seal member has an inner tube portion and a water-proof portion. The push tube is connected to the press head and has a second locking portion. The cylinder unit has a piston and a main rod respectively connected to the push tube. The main rod has a seal part and the cylinder unit has a narrowed portion. When the press head is pressed, the first locking portion and the second locking portion are positioned and the press head is easily assembled. The narrowed portion and the seal part, and the top of the inner tube portion and the annular face are engaged with each other to prevent from leakage.

Abstract: A foam spray head assembly includes a press head connected to a cap, a netted tube, a valve member, a main tube, a piston unit, a link unit, a resilient member, a cylinder unit and a valve. The netted tube is connected to the valve member. An outlet is defined between the first link of the link unit and the first tube. An inlet is defined between the second link of the link unit and the protrusion of the piston unit. The resilient member is mounted to the second tube and contacts the flange of the second tube. The first piston of the cylinder unit is movable in the first cylinder to form a sealed second chamber. The second piston of the cylinder unit is movable in the second cylinder to form a sealed third chamber. The valve is located in the passage of the second cylinder.

Abstract: A spray head assembly includes a press head, a seal member, a push tube, a piston unit, a resilient member, a cylinder unit, a valve and a mount. The press head has an annular face and a first locking portion. The seal member has an inner tube portion and a water-proof portion. The push tube is connected to the press head and has a second locking portion. The cylinder unit has a piston and a main rod respectively connected to the push tube. The main rod has a seal part and the cylinder unit has a narrowed portion. When the press head is pressed, the first locking portion and the second locking portion are positioned and the press head is easily assembled. The narrowed portion and the seal part, and the top of the inner tube portion and the annular face are engaged with each other to prevent from leakage.

Abstract: A push-type nozzle assembly includes a main tube, a valve, a suction unit and a push unit. The suction unit includes a push rod, a connection rod, a block and a seal sleeve. A spring is mounted between the seal sleeve and the push rod. The spring provides a force to move the block and the connection rod back and forth between the closed position and an open position. Because the spring is located outside of the push rod, the spring does directly contact the liquid which is avoided from being chemically changed.

Abstract: A foam spray head assembly includes a press head connected to a cap, a netted tube, a valve member, a main tube, a piston unit, a link unit, a resilient member, a cylinder unit and a valve. The netted tube is connected to the valve member. An outlet is defined between the first link of the link unit and the first tube. An inlet is defined between the second link of the link unit and the protrusion of the piston unit. The resilient member is mounted to the second tube and contacts the flange of the second tube. The first piston of the cylinder unit is movable in the first cylinder to form a sealed second chamber. The second piston of the cylinder unit is movable in the second cylinder to form a sealed third chamber. The valve is located in the passage of the second cylinder.