Abstract: A device includes: a complementary transistor including: a first transistor having a first source/drain region and a second source/drain region; and a second transistor stacked on the first transistor, and having a third source/drain region and a fourth source/drain region, the third source/drain region overlapping the first source/drain region, the fourth source/drain region overlapping the second source/drain region. The device further includes: a first source/drain contact electrically coupled to the third source/drain region; a second source/drain contact electrically coupled to the second source/drain region; a gate isolation structure adjacent the first and second transistors; and an interconnect structure electrically coupled to the first source/drain contact and the second source/drain contact.

Abstract: An automatic valve, which is able to automatically seal a pipe when a tap is removed from the pipe, is disclosed. The valve consists of a collar, a disc and an "X" shaped member. The collar defines a central hole and a male threaded portion at an outer periphery thereof to engage with a female threaded portioned portion at the outlet of the pipe. Two opposed protrusions extend from a side face of the collar. Each of the protrusions axially defines a pair of slots. The disc is shaped for being exactly received within the central hole of the collar. The "X" shaped member is formed of a pair of integrated and intersected arms and has four ends radially and respectively received within the slots. A stem integrally and perpendicularly extends from a crossover point of the arms to the disc through the central hole of the collar.