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: A method of manufacturing a seamless inflatable ball contains: 1) inflating air into a preformed body so as to form a spherical body and covering a medium layer on the spherical body so as to form a semi-finished part; 2) forming a fluidic surface material on the medium layer of the semi-finished part in a predetermined thickness so as to produce a spherical portion with a covering layer; 3) placing the spherical portion into two ball molds; and 4) partially discharging air out of the spherical body and inflating the air into the spherical body repeatedly. In the step 3), the spherical portion is clamped in the two ball molds, and after the fluidic surface material is dried or is solidified to form a solid layer on the spherical portion, the spherical portion is removed from the two ball molds, thus forming a sphere.

Abstract: A method of manufacturing a seamless inflatable ball contains: 1) inflating air into a preformed body so as to form a spherical body and covering a medium layer on the spherical body so as to form a semi-finished part; 2) forming a fluidic surface material on the medium layer of the semi-finished part in a predetermined thickness so as to produce a spherical portion with a covering layer; 3) placing the spherical portion into two ball molds; and 4) partially discharging air out of the spherical body and inflating the air into the spherical body repeatedly. In the step 3), the spherical portion is clamped in the two ball molds, and after the fluidic surface material is dried or is solidified to form a solid layer on the spherical portion, the spherical portion is removed from the two ball molds, thus forming a sphere.