摘要:
Disclosed is photoresist using dioxaspiro ring-substitued acryl derivatives, represented by the following chemical formula I or II. As matrix polymers, homopolymers of dioxaspiro ring-substitued acryl monomers or their copolymers with acryl monomers are provided. The deprotection of the dioxaspiro rings from the matrix polymers, usually accomplished by the action of a photoacid generator, causes a great change in the water solubility of the matrix, thereby allowing the matrix to be used for the photoresist required to have high sensitivity, resolution and contrast.
摘要:
Copolymers containing N-vinyllactam derivatives protected at 3-position are provided and represented by the following formula. The copolymers are used as a photoresist material suitable for deep uv process so that high sensitivity and resolution can be obtained. In addition, ultrafine circuits can be formed and an exceptional improvement in PED stability can be accomplished by use of the photoresist. ##STR1##
摘要:
Disclosed is an axial flow fan capable of preventing cracks from generating at parts where stress is concentrated, by improving the structure. For this, the axial flow fan includes a hub, a plurality of wings extended from an outer surface of the hub, and a reinforcing member filling a space formed between the outer surface of the hub and a front edge part of each wing.
摘要:
A photoresist composition including an oxetane-containing compound represented by Formula 1 or 2, an oxirane-containing compound represented by Formula 3 or 4, a photoinitiator, and a solvent, a method of forming a pattern using the photoresist composition, and an inkjet print head including a polymerization product of the photoresist composition. The photoresist composition provides a polymerization product which resists formation of cracks due to an inner stress, and has excellent heat tolerance, excellent chemical resistance, excellent adhesiveness, and excellent durability.
摘要:
A centrifugal fan, which equally maintains air-blowing capacities of both inlets regardless of different suction resistances of both inlets due to a driving device, and an air conditioner having the centrifugal fan. The centrifugal fan includes a rotary plate; first blades disposed at the edge of one surface of the rotary plate; and second blades disposed at the edge of the other surface of the rotary plate, and having a larger outer diameter than the outer diameter of the first blades. Thus, although a large flow resistance is generated at one inlet of the centrifugal fan due to the driving device, air-blowing capacities of both inlets are maintained equally.
摘要:
Disclosed is an axial flow fan capable of preventing cracks from generating at parts where stress is concentrated, by improving the structure. For this, the axial flow fan includes a hub, a plurality of wings extended from an outer surface of the hub, and a reinforcing member filling a space formed between the outer surface of the hub and a front edge part of each wing.
摘要:
An oxetane-containing compound, a photoresist composition including the same, a method of preparing patterns using the photoresist composition, and an inkjet print head including polymerization products of the oxetane-containing compound.
摘要:
A turbo fan including backward-inclined blades that are inclined in a direction opposite to a rotating direction of a rotating plate. A positive pressure surface of each blade, facing the rotating direction of the rotating plate, takes the form of a flat surface, and a negative pressure surface of the blade, opposite to the rotating direction of the rotating plate, takes the form of a convexly-curved surface. A radius of curvature defined by the convexly-curved negative pressure surface is within a range of 2.5˜4 times of a radius of the turbo fan. The turbo fan can reduce noise and consumption of power together, and consequently, an air conditioner having the turbo fan can achieve an improvement in performance.
摘要:
An air purifier including: a filter which removes contaminants from air passing therethrough; a fan which generates a flow force to pass air through the filter; and a rotating body rotatably mounted in the air purifier and defining a flow path around the fan, a discharge direction of the flow path being varied by rotation of the rotating body.
摘要:
A turbofan to reduce noise through a suppression of turbulent air flow at an outlet thereof and also to guide the air discharged from the outlet in a specific discharging direction, and an air conditioner equipped with the turbofan to improve an efficiency of a heat exchange. The turbofan includes a rotating plate coupled to a shaft of a drive motor, a plurality of blades radially arranged on a peripheral area of a front face of the rotating plate, a ring-shaped shroud joining to ends of the plurality of blades, and a flow guide rib extending from a peripheral edge of the rotating plate in a rearward direction to guide the air discharged from the turbofan.