Abstract: A field effect transistor includes a substrate having a transistor forming region thereon; an insulating layer on the substrate; a first graphene layer on the insulating layer within the transistor forming region; an etch stop layer on the first graphene layer within the transistor forming region; a first inter-layer dielectric layer on the etch stop layer; a gate trench recessed into the first inter-layer dielectric layer and the etch stop layer within the transistor forming region; a second graphene layer on interior surface of the gate trench; a gate dielectric layer on the second graphene layer and on the first inter-layer dielectric layer; and a gate electrode on the gate dielectric layer within the gate trench.

Abstract: An imaging system lens assembly includes a first lens group and a second lens group. The first lens group includes a first catadioptric lens element and a second catadioptric lens element, the second lens group includes at least one lens element. Each of an object-side surface and an image-side surface of the first catadioptric lens element and the second catadioptric lens element includes a central region and a peripheral region. The peripheral region of the object-side surface of the first catadioptric lens element includes a first refracting surface. The peripheral region of the image-side surface of the second catadioptric lens element includes a first reflecting surface. The central region of the object-side surface of the first catadioptric lens element includes a second reflecting surface. The central region of the image-side surface of the second catadioptric lens element includes a last refracting surface.

Abstract: A semiconductor device includes a first stack structure, a second stack structure, and a third stack structure. Each of the stack structure includes semiconductor layers vertically spaced from one another. The first, second, and third stack structures all extend along a first lateral direction. The second stack structure is disposed between the first and third stack structures. The semiconductor device includes a first gate structure that extends along a second lateral direction and wraps around each of the semiconductor layers. The semiconductor layers of the first stack structure are coupled with respective source/drain structures. The semiconductor layers of the second stack structure are coupled with respective source/drain structures. The semiconductor layers of the third stack structure are coupled with a dielectric passivation layer.

Abstract: A catadioptric optical membrane, which is disposed on a surface of a substrate, includes a reflection membrane and a matting membrane. The reflection membrane is disposed on an effective optical path area of the substrate and includes a reflection metal membrane and a reflection oxidation membrane. The reflection oxidation membrane includes a first reflection oxidation membrane and a second reflection oxidation membrane. The reflection metal membrane is farther away from the substrate than the first reflection oxidation membrane. The second reflection oxidation membrane is farther away from the substrate than the reflection metal membrane. The matting membrane is disposed on a non-effective optical path area of the substrate. The matting membrane includes a deep-color membrane and a first anti-reflection membrane. The deep-color membrane includes a deep-color metal membrane and a deep-color oxidation membrane. The deep-color membrane is farther away from the substrate than the first anti-reflection membrane.

Abstract: A method includes etching a semiconductor substrate to form a trench, with the semiconductor substrate having a sidewall facing the trench, and depositing a first semiconductor layer extending into the trench. The first semiconductor layer includes a first bottom portion at a bottom of the trench, and a first sidewall portion on the sidewall of the semiconductor substrate. The first sidewall portion is removed to reveal the sidewall of the semiconductor substrate. The method further includes depositing a second semiconductor layer extending into the trench, with the second semiconductor layer having a second bottom portion over the first bottom portion, and a second sidewall portion contacting the sidewall of the semiconductor substrate. The second sidewall portion is removed to reveal the sidewall of the semiconductor substrate.

Abstract: A semiconductor device includes a substrate. The semiconductor device includes a fin that is formed over the substrate and extends along a first direction. The semiconductor device includes a gate structure that straddles the fin and extends along a second direction perpendicular to the first direction. The semiconductor device includes a first source/drain structure coupled to a first end of the fin along the first direction. The gate structure includes a first portion protruding toward the first source/drain structure along the first direction. A tip edge of the first protruded portion is vertically above a bottom surface of the gate structure.

Abstract: An optical imaging lens includes six lens elements. The object-side surface of the first lens element has a convex part in a vicinity of the periphery of the first lens element, the image-side surface of the second lens element has a concave part in a vicinity of the periphery of the first lens element, the object-side surface of the third lens element has a convex part in a vicinity of the optical axis, the image-side surface of the fourth lens element has a convex part in a vicinity of the periphery of the fourth lens element, the image-side surface of the fifth lens element has a concave part in a vicinity of the optical axis, and the sixth lens element has negative refractive power.

Abstract: A method of fabricating a semiconductor device is disclosed. The method includes forming semiconductor fins on a substrate. A first dummy gate is formed over the semiconductor fins. A recess is formed in the first dummy gate, and the recess is disposed between the semiconductor fins. A dummy fin material is formed in the recess. A portion of the dummy fin material is removed to expose an upper surface of the first dummy gate and to form a dummy fin. A second dummy gate is formed on the exposed upper surface of the first dummy gate.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, disposed sequentially from an object side to an image side, each of the lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the first lens element comprises a concave portion in a vicinity of an optical axis. The object-side surface of the third lens element comprises a concave portion in a vicinity of a periphery of the third lens element. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The lens elements of the optical imaging lens as a whole are only the six lens elements.

Abstract: An example system can include a noise sensor communicatively coupled to a controller of a computing device to dynamically determine a sound pressure level (SPL) of an environment in which the computing device is present. The computing device can include a cooling fan and the controller comprising a processor in communication with a memory resource including instructions executable to dynamically determine a threshold speed of the cooling fan based on the determined SPL of the environment set a speed of the cooling fan based on the determined threshold speed.

Abstract: An image lens assembly includes five lens elements which are, in order from an outer side to an inner side along an optical path: a first lens element, a second lens element, a third lens element, a fourth lens element and a fifth lens element. Each of the five lens elements has an outer-side surface facing toward the outer side and an inner-side surface facing toward the inner side. The outer-side surface of the first lens element is concave in a paraxial region thereof, and the outer-side surface of the first lens element has at least one inflection point.

Abstract: An optical imaging lens comprises first, second, third, fourth, fifth and sixth lens elements arranged sequentially from an object side to an image side along an optical axis. The object-side surface of the second lens element has a concave portion in the vicinity of a periphery of the second lens element, and the image-side surface of the second lens element has a concave portion in a vicinity of the optical axis. The image-side surface of the third lens element has a concave portion in the vicinity of a periphery of the third lens element. An effective focal length of the optical imaging lens is EFL, an air gap between the fourth lens element and the fifth lens element along the optical axis is G45, a central thickness of the sixth lens element along the optical axis is represented by T6, and EFL, G45 and T6 satisfy the equation: EFL/(G45+T6)?6.40.

Abstract: An optical imaging lens includes six lens elements positioned sequentially from an object side to an image side along an optical axis. The image-side surface of the first lens element has a concave portion in a vicinity of the periphery of the first lens element and the object-side surface of the sixth lens element has a convex portion in a vicinity of the periphery of the sixth lens element. Gaa is a sum of all five air gaps from the first lens element to the sixth lens element along the optical axis, T5 is a central thickness of the fifth lens element along the optical axis, and Gaa and T5 satisfy the equation Gaa/T5?3.85.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, disposed sequentially from an object side to an image side, each of the lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the first lens element comprises a concave portion in a vicinity of an optical axis. The object-side surface of the third lens element comprises a concave portion in a vicinity of a periphery of the third lens element. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The lens elements of the optical imaging lens as a whole are only the six lens elements.

Abstract: An optical imaging lens includes six lens elements. The object-side surface of the first lens element has a convex part in a vicinity of the periphery of the first lens element, the image-side surface of the second lens element has a concave part in a vicinity of the periphery of the first lens element, the object-side surface of the third lens element has a convex part in a vicinity of the optical axis, the image-side surface of the fourth lens element has a convex part in a vicinity of the periphery of the fourth lens element, the image-side surface of the fifth lens element has a concave part in a vicinity of the optical axis, and the sixth lens element has negative refractive power.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, each having an object-side surface facing toward an object side and an image-side surface facing toward an image side. The image-side surface of the first lens element includes a concave portion in a vicinity of a periphery of the first lens element. The optical imaging lens as a whole has only the six lens elements having refractive power. The ratio between the f-number of the optical imaging lens and thicknesses of the lens elements satisfies certain relations.

Abstract: An optical imaging lens includes first, second, third, fourth, fifth, and sixth lens elements, disposed sequentially from an object side to an image side, each of the lens elements having an object-side surface facing toward the object side and an image-side surface facing toward the image side. The image-side surface of the first lens element comprises a concave portion in a vicinity of an optical axis. The object-side surface of the third lens element comprises a concave portion in a vicinity of a periphery of the third lens element. The object-side surface of the fourth lens element comprises a concave portion in a vicinity of the optical axis. The lens elements of the optical imaging lens as a whole are only the six lens elements.

Abstract: An imaging lens includes first to sixth lens elements having refractive power and arranged in order from an object side to an image side along an optical axis of the imaging lens. Through designs of surfaces of the lens elements and relevant optical parameters, a short system length of the imaging lens may be achieved while maintaining good optical performance.

Abstract: An optical imaging lens includes six lens elements. The object-side surface of the first lens element has a convex part in a vicinity of the periphery of the first lens element, the image-side surface of the second lens element has a concave part in a vicinity of the periphery of the first lens element, the object-side surface of the third lens element has a convex part in a vicinity of the optical axis, the image-side surface of the fourth lens element has a convex part in a vicinity of the periphery of the fourth lens element, the image-side surface of the fifth lens element has a concave part in a vicinity of the optical axis, and the sixth lens element has negative refractive power.

Abstract: An impeller for a viscous flow fan includes a hub having a longitudinal axis, and a plurality of ring-shaped wave blades disposed about and coupled to a perimeter of the hub, the wave blades disposed in a parallel and spaced apart from one another along the longitudinal axis by a blade gap. Each wave blade includes a center coincident with the longitudinal axis, an inner perimeter, an outer perimeter, and a wave-like cross-section about the perimeter of the hub in a direction perpendicular to the longitudinal axis, wherein at least a portion of the inner perimeter of at least one of the wave blades is spaced from the perimeter of the hub to form an air intake gap.