Solvent Free Liquid Photoresist

无溶剂液体光刻胶

• 批准号: 9460589
• 负责人: Steven Johnson
• 金额: $ 7.32万
• 依托单位: International Polymer Systems
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9460589&HistoricalAwards=false
• 关键词: Solvent; Free; Liquid; Photoresist

This Small Business Innovation Research Phase I project proposes a novel liquid photoresist chemistry to produce printed circuit boards (PCBs). This chemistry permits 100% solids application, eliminating objectionable solvents used in the application of currently available photoresists. The innovative chemistry uses a hardener blocked with a reactive component. This hardener is combined with suitable monomers, oligomers containing acid (COOH) functionality, polymeric binders, photoinitiators and photosensitizers. Following coating the material is heated to dissociate the blocked hardener, resulting in a partial cross linking of the reactive component, forming a tack-free (B-Stage) surface. The coating is patternable with U.V. light which through a free radical photoreaction results in selective polymerization of the coating. The unexposed material is developed with a 18 sodium or potassium carbonate water solution. The patterned photoresist is then used to define the negative image for subsequent etching, plating and electroplating. The photoresist is subsequently removed by stripping in a 108 sodium or potassium carbonate water solution. This program will demonstrate the feasibility of this approach by demonstrating this material on real circuit board substrate at a commercial printed circuit board vendor.

该小型企业创新研究第一阶段项目提出了一种新型液体光刻胶化学物质来生产印刷电路板 (PCB)。这种化学物质允许 100% 固体应用，消除了当前可用光刻胶应用中使用的令人反感的溶剂。这种创新的化学方法使用了一种用反应性成分封闭的硬化剂。该硬化剂与合适的单体、含有酸（COOH）官能团的低聚物、聚合物粘合剂、光引发剂和光敏剂组合。涂覆后，加热材料以解离封端硬化剂，导致反应性组分部分交联，形成不粘手（B 阶段）表面。该涂层可通过紫外线形成图案。通过自由基光反应导致涂层选择性聚合的光。未曝光的材料用18碳酸钠或碳酸钾水溶液显影。然后使用图案化的光刻胶来定义负像，以便进行后续的蚀刻、电镀和电镀。随后通过在108碳酸钠或碳酸钾水溶液中剥离来去除光致抗蚀剂。 该计划将通过在商业印刷电路板供应商的真实电路板基板上演示这种材料来证明这种方法的可行性。