关键词: 丝网印刷, 阻值一致性, 厚膜印刷陶瓷基板, 阻值漂移率

Abstract: When using the screen printing technology to produce thick film printed ceramic substrates, the printing resistance of different areas on the substrate is usually different. Through the comprehensive analysis of the screen tension, resilience and the downward pressure of the scraper during the screen printing process, it is concluded that the amount of slurry printed on the substrate is positively correlated with the resultant force of the screen tension, resilience and downward pressure, and then it is concluded that the printing direction of the scraper has a great influence on the printing of linear resistance. Experiments show that compared with the traditional scraper printing parallel to the length direction of the linear resistance, when the scraper printing perpendicular to the length direction of the linear resistance, the resistance drift rate in the plate is narrowed from 11.24% to 4.46%, and the printing resistance consistency of the product is greatly improved, which can meet the requirements of the upper and lower limits of product tolerance, avoid the expensive laser resistance repair process, and save the cost. Experiments show that for complex graphics, the relationship between the line orientation and the scraper printing direction does have a significant impact on the uniformity of slurry distribution, and the universality of this conclusion has been validated through complex graphics.

Key words: screen printing, consistency of resistance value, thick film printed ceramic substrate, resistance drift rate