A kind of flash corrosion potion suitable for msap process

Abstract

The invention discloses a flash rusting liquid medicine applicable to an MSAP process. A banking agent and copper ions in the liquid medicine form a complex to be attached to the surface of copper, sothat base copper between circuits can spray towards the liquid in horizontal spraying equipment; a complex protection film is cracked easily to enable the base copper to be etched and dissolved, while a complex protection film on the side wall of the circuit suffers from relatively low liquid disturbance, so that copper on the side wall can be protected from corrosion; therefore, coating of an etching suppression layer before flash rusting is not needed; the banking agent can control the circuit side wall etching rate to be half of the top etching rate; by virtue of a wetting agent, the copper surface hydrophilicity is improved, so hat the etching liquid can be fully reacted with copper to achieve an etching acceleration effect; by virtue of a stabilizing agent, hydrogen peroxide can be decomposed and high in copper resistance; the flash rusting liquid medicine can process fine circuits with linewidth and line spacing of 45[mu]m or below; and in addition, high reliability is achievedin the circuit etching process, vacuum etching equipment is not needed, and low cost, simple process, and easy management and control are achieved.

Description

technical field [0001] The invention belongs to the technical field of printed circuit board production, and relates to an etching solution, in particular to a flash etching solution suitable for MSAP technology. Background technique [0002] With the rapid development of electronic devices represented by smart phones and tablet computers, electronic products are becoming more and more comprehensive in function and smaller in size, so the requirements for printed circuit boards (PCB) are getting higher and higher, and Driving the PCB industry to develop in the direction of high density, high integration, packaging, miniaturization and multi-layering, the requirements for the refinement level of PCB product lines are also getting higher and higher. At present, the line width and spacing above 75μm / 75μm have already It cannot meet the development requirements of today's electronic products. The line width and spacing of high-end smartphones and tablet computers have generally ...

AI Technical Summary

Problems solved by technology

However, at present, the types and effects of flash corrosion potions are limited, and the etching efficiency is insufficient. The line width and line spacing of etching lines are generally as low as 45 μm / 45 μm, and the reliability is greatly reduced if it is lower than this value. High, lengthy process, complicated management and control