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In this way, DNQ has become an important reagent in photoresist technology in the semiconductor industry. [1] Diazonaphthoquinone sulfonic acid esters are components of common photoresist materials. Such photoresists are used in the manufacture of semiconductors. [2] [3] [4] In this application DNQs are mixed with Novolac resin, a type of ...
Positive photoresists are composed of a novolac resin, ethyl lactate solvent, and Diazonaphthaquinone (DQ) as the photoactive compound. [9] Positive photoresist reacts with light to cause the polymer to break down and become soluble in a developer solution. Positive resist has better resistance to etchant than negative photoresist.
A photoresist (also known simply as a resist) is a light-sensitive material used in several processes, such as photolithography and photoengraving, to form a patterned coating on a surface. This process is crucial in the electronics industry. [1] The process begins by coating a substrate with a light-sensitive organic material.
The term comes from Swedish "lack" for lacquer and Latin "novo" for new, since these materials were envisioned to replace natural lacquers such as copal resin. Typically novolaks are prepared by the condensation of phenol or a mixture of p- and m-cresol with formaldehyde (as formalin). The reaction is acid catalyzed.
This is also due to its low moisture uptake. [1] This property, together with a higher toughness compared to epoxies, also makes it a valuable material in aerospace applications. For example, the Lynx Mark II spaceplane is primarily made of carbon/cyanate ester. [2] The chemistry of the cure reaction is a trimerization of three CN groups to a ...
Atlastin-1 is a member of the dynamin/Mx/guanylate-binding protein superfamily of large GTPases. The enzyme contains an endoplasmic reticulum (ER) retention moiety, indicating that it functions predominantly in the organelle. It is highly expressed in the mammalian central nervous system and is enriched in the hippocampus and pyramidal neurons ...
Chronic relapsing inflammatory optic neuropathy (CRION) is a form of recurrent optic neuritis that is steroid responsive and dependent. [1] Patients typically present with pain associated with visual loss. [1] CRION is a clinical diagnosis of exclusion, and other demyelinating, autoimmune, and systemic causes should be ruled out. [3]
There is currently no known pharmacological treatment to hereditary motor and sensory neuropathy. However, the majority of people with these diseases are able to walk and be self-sufficient. [3] Some methods of relief for the disease include physical therapy, stretching, braces, and sometimes orthopedic surgery.
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