A Surface Treatment Method for Miniature RF Glass Insulators
A radio-frequency glass and surface treatment technology, which is applied in the direction of insulators, electrical components, circuits, etc., can solve problems such as lead wire stress corrosion cracking, achieve uniform surface state, eliminate stress sensitivity of the coating, and dense coating structure
Active Publication Date: 2021-12-28
中国电子科技集团公司第四十研究所
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a surface treatment method for a micro-RF glass insulator, which effectively solves the problem of stress corrosion cracking at the root of the lead wire of the micro-RF glass insulator
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[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0017] A surface treatment method for a miniature radio frequency glass insulator, specifically comprising the following steps:
[0018] (1) Micro-RF glass insulators have a severely oxidized area of about 0.2 mm at the root of the lead wire after high-temperature sintering, and its main components are Fe, Co, Ni, Si, C and other oxides; The surface of the glass insulator is chemically polished for the first time to remove most of the oxide layer at the root...
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Abstract
The invention discloses a surface treatment method of a miniature radio frequency glass insulator. Firstly, the surface of the miniature radio frequency glass insulator formed by high temperature sintering is subjected to the first chemical polishing treatment, then the magnetic grinding is performed, and finally the second chemical polishing is performed; After the first chemical polishing, the surface of the micro-RF glass insulator is cross-plated. The electroplating layer includes four layers from the inside to the outside, which are the first nickel layer, the first gold layer, the second nickel layer and the second layer. gold layer. The present invention adopts the combined method of secondary chemical polishing + magnetic grinding for the treatment before electroplating, so that the oxide layer at the root of the lead can be completely removed, and the surface state is uniform, that is, after the subsequent surface is plated with metal, the coating structure is dense and uniform, smooth and consistent , Eliminate the stress sensitivity of the coating; the invention adopts the nickel-gold cross-plating technology, which makes the coating structure compact, has no stress corrosion channel, and effectively eliminates the stress.
Description
technical field [0001] The invention relates to the technical field of radio frequency glass insulators, in particular to a surface treatment method for miniature radio frequency glass insulators. Background technique [0002] With the improvement of electronic integration, the structure size of radio frequency glass insulators tends to be miniaturized. See figure 1 , The micro-RF glass insulator is made of lead 1, glass blank 2 and shell 3 from inside to outside through high-temperature sintering under nitrogen protection. The lead wire diameter is ≤ φ0.5mm, and the shell diameter is about φ1.5-φ3mm. Miniature RF glass insulators are used as insulating supports for the internal and external circuits of RF connecting devices. In order to improve the anti-corrosion ability and weldability of the miniature radio frequency glass insulator, a gold layer is usually plated on the surface of the metal material (the shell 3 and the part of the lead 1 extending out of the shell 3) ...
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IPC IPC(8): H01B19/04C25D5/14C25D5/54
CPCH01B19/04C25D5/14C25D5/54
Inventor 徐玉娟
Owner 中国电子科技集团公司第四十研究所