Production technology of ribbon-type high-pitch diaphragm

Abstract

The invention discloses a production technology of a ribbon-type high-pitch diaphragm. The production technology comprises the steps that the size and the line of the composite high-pitch diaphragm are designed through CAD, a film negative plate is drawn, the height, the width and the length of the line are calculated according to technology resistance and the area of the composite high-pitch diaphragm, and the film negative plate is extended in a makeup mode; a polyimide diaphragm is used as a substrate, an aluminum foil is used as covering material, composite high-pitch diaphragm sheet material is formed in a high-temperature hot press mode, and four corners of the substrate adhere to a base plate; the surface of the covering material is cleaned in a spraying mode; photo-sensitive resist coats the surface of the covering material and is dried; the film negative plate covers a photo-sensitive resist diaphragm layer for exposure; developing, photographic fixing, cleaning and drying are conducted on the sheet material; damaged and incomplete places of an image are repaired, the sheet material is etched and cleaned, etching liquid is ferric trichloride, and the content of iron ions Fe3+ in the ferric trichloride is 46%; demoulding and cleaning are conducted on the sheet material; the sheet material is dipped with aluminum oxidation protective liquid; and the resistance value of the composite high-pitch diaphragm is checked finally. According to the ribbon-type high-pitch diaphragm prepared through the production technology, the line resistance value is formed at a time without repair, accuracy of the resistance value is high, and the using ratio of raw material is high.

Description

【Technical field】 [0001] The invention relates to a production process of a belt-type high-pitched diaphragm. The belt-type high-pitched diaphragm processed by the production process is applied to a high-grade loudspeaker, and belongs to the technical field of photochemical etching technology. 【Background technique】 [0002] The sound diaphragm as the core part of the speaker directly affects the performance of the speaker. With the rapid development of ultra-thin electronic products, the ultra-thinning of TVs, mobile phones and other electronic products that can produce sound has become a market development trend, resulting in more and more limitations in acoustic design and traditional split-type cone voice coils that take up a lot of space It is no longer suitable. Eliminating paper / plastic sound cones and copper wire voice coils and replacing them with ultra-thin integrated sound diaphragms made of polyimide film and aluminum foil has become the development direction. Ho...

AI Technical Summary

Problems solved by technology

With the rapid development of ultra-thin electronic products, the ultra-thinning of TVs, mobile phones and other electronic products that can produce sound has become a market development trend, resulting in more and more limitations in acoustic design and traditional split-type cone voice coils that take up a lot o

Images