Abstract: A heterogeneous integration chip of a micro fluid actuator is disclosed and includes a first substrate, a first insulation layer, a first conductive layer, a piezoelectric layer, a second conductive layer, a second substrate, a control element, a perforated trench and a conductor. The first substrate includes a first chamber. The first insulation layer is disposed on the first substrate. The first conductive layer is disposed on the first insulation layer and includes an electrode pad. The piezoelectric layer and the second conductive layer are stacked on the first conductive layer sequentially. The second substrate is assembled to the first substrate through a bonding layer to define a second chamber and includes an orifice, a fluid flowing channel and a third chamber. The control element is disposed in the second substrate. The perforated trench filled with the conductor is penetrated from the electrode pad to the second substrate.

Abstract: A center position device for a mold includes an outer housing, and an inner housing. An annular permanent magnet is fitted in the inner housing and covered by a disc secured with washers to close up flat an open lower side of the outer housing. The plural annular magnetic bands are formed in the lower side to be attracted to a mold. The outer housing has a center tubular wall for engaging a sleeve tubular bolt, and a headless tubular bolt engaging in a female threaded hole of the sleeve bolt. A correct pin is fitted in a lower center hole of the headless bolt. A wrench screws the headless bolt to move the correct pin to protrude in an injecting hole of the mold so that after the device is fitted in a threaded rod hole of an injecting machine, the injecting injecting hole of the mold is correctly aligned to the injecting hole of a threaded rod of the machine.