Method for manufacturing conductive pattern on flexible substrate and protective printing oil thereof

Abstract

The invention provides a method for manufacturing a conductive pattern on a flexible substrate and protective printing oil thereof. The method comprises the following steps: providing the flexible substrate with a conductive layer; exposing part of the conductive layer covered by the protective printing oil by screen printing; etching and removing the exposed part of the conductive layer by using the protective printing oil as a mask; and removing the protective printing oil and remaining the conductive layer not etched to form the conductive pattern with the minimum line width not less than 150 microns. The invention also provides the protective printing oil used in the technology.

Description

technical field [0001] The invention relates to a method for making a conductive pattern, and in particular to a method for making a conductive pattern on a flexible substrate and the protective ink used therein. Background technique [0002] Flexible electronics (Flexible Electronics) technology has become one of the key research and development topics around the world in recent years. Unlike traditional electronic components that use hard silicon substrates or flat glass, flexible electronics generally refers to the technology and application of microelectronic components fabricated on flexible plastic or thin metal substrates, which have the advantages of cheap process, light weight, The cost is extremely low, and it is resistant to falling and impact. Since flexible electronic components can be used to manufacture electronic products of various shapes, the degree of freedom in product design is high. Life will have a comprehensive and fundamental impact. [0003] Flex...

AI Technical Summary

Problems solved by technology

[0003] Flexible coating (Flexible Coating) is an important key technology towards the flexible electronics industry. Since the traditional silicon substrate and glass substrate-based process technology can no longer meet the technical applications on flexible or flexible substrates, the development of A new process suitable for flexible substrates has become a top priority

[0004] The printing ink of traditional screen printing is only suitable for thick lines, not for printing fine lines. Therefore, the traditional photoresist exposure and development yellow light process is generally used to make conductive line patterns with a line width below 100 μm. The process is complicated and the exposure and development equipment is expensive, so it is not easy to make conductive lines or electrodes on flexible substrates

At present, flexible displays also try to use printing technology. For example, the patent of US Patent Publication No. 20040157974 uses blank substrate screen printing to leave a circuit pattern as a photomask, and then evaporates the conductive material of the circuit / electrode on the substrate. , and then remove the ink photomask to form a circuit pattern, but the process of making a conductive pattern requires a process of evaporating a conductive material, which makes the entire flexible liquid crystal display process complicated and expensive, and the cost is high and cannot be wound. (Roll to Roll) continuous mass production

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