2results about How to "Enough deformation" patented technology

The invention belongs to the field of hybrid bonding, and particularly discloses a bonding head for hybrid bonding and a bonding method.The bonding head comprises a bonding head body, the lower surface of the bonding head body is of a horizontal structure, and an annular air pressure groove with a downward opening is formed in the lower surface of the bonding head body along the edge; the positive-negative air pressure device is used for adjusting the air pressure in the annular air pressure groove; and the moving rod assembly comprises a main moving rod and a plurality of auxiliary moving rods, the main moving rod and the auxiliary moving rods penetrate through the bonding head body, and the auxiliary moving rods are arranged around the peripheral side of the main moving rod. According to the bonding head, the annular air pressure groove is formed in the bonding head body, the adsorption force on the to-be-bonded chip is increased, in the bonding process, the main moving rod and the auxiliary moving rod can push the to-be-bonded chip to enable the to-be-bonded chip to have enough deformation quantity, the chip cannot be separated from the bonding head body, the bonding effect of hybrid bonding is improved, and the bonding efficiency is improved. And voids on the bonding interface are avoided.

This utility model discloses a rebound hammer for non-destructive testing of UHPC compressive strength, belonging to the field of concrete engineering testing technology. It includes a hollow shell, an impact rod, an impact hammer, an impact spring, a guide rod, a hook assembly, and a switch. The impact rod is telescopically connected to one end of the shell. One end of the impact spring is fixed, and the other end is connected to the impact hammer. Both the impact hammer and the hook assembly are slidably connected to the guide rod. The hook assembly can slide along the guide rod and engage with the impact hammer. The switch controls the release of the impact hammer by the hook assembly. The free length of the impact spring is 134.4±0.5mm, and the impact length after stretching is 140.0±0.5mm. The wire diameter of the impact spring is greater than 1.5mm. The UHPC compressive strength regression equation is: ; the value of c ranges from -0.001 to -0.004, where is the average rebound value of the test area or specimen, is the average carbonation depth of the test area, and is the converted value of concrete strength in MPa. This enables non-destructive testing of the compressive strength of UHPC.