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Method for mfg. diamondoid composite diaphragm of loudspeaker

A technology of diamond-like film and diamond, which is applied in the field of depositing diamond-like film, can solve the problems that the quality and performance of the diamond-like film are not particularly good, it is difficult to prepare a transition layer, and the deposition time is long, and the cost is low, the deposition area is small, The effect of high deposition rate

Inactive Publication Date: 2003-03-12
GUANGZHOU RES INST OF NON FERROUS METALS
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Problems solved by technology

Generally speaking, the quality and performance of the diamond-like film prepared by this method are not particularly good. If the diamond-like structure contained is less, the hardness of the film is low, about Hv1000-2500; this method is difficult to prepare without A transition layer that improves the bonding force of the membrane / base; and the number of diaphragms deposited in each furnace is small, and the deposition time is long (about 3 hours per furnace), so there are certain limitations in the improvement of the sound quality of the diaphragm and in the scale production

Method used

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  • Method for mfg. diamondoid composite diaphragm of loudspeaker

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Embodiment

[0019] The preparation of the diamond-like carbon film is carried out on an eight-arc source vacuum cathodic arc deposition equipment. The outer diameter of the deposited titanium diaphragm is Φ62mm, and the diameter of the voice coil is Φ44.5mm. Before loading into the furnace, it is strictly cleaned to remove surface grease, dust and other pollutants. After dehydration in alcohol, it is dried. The diaphragm is fixed with a clamp and hung On the workpiece rack of the coating machine, the loading capacity is about 150 pieces.

[0020] Vacuum down to 4×10 -3 After Pa, pass argon gas to start the titanium arc source, at a bias voltage of 800V, and an air pressure of 1×10 -2 Under Pa, perform ion bombardment cleaning for 10 minutes.

[0021] At bias voltage 200V, hydrogen pressure 1×10 -2 Under Pa, start titanium and graphite cathode arcs, and deposit titanium and titanium carbide transition layers for 10 minutes.

[0022] At hydrogen pressure 1×10 -2 Under Pa, the graphite ...

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Abstract

The vacuum-cathode arc source is adopted in the invention and the graphite is as the target cathode. Using the carbon plasma generated by the vacuum-cathode graphite arc deposits the diamond-like film on the diaphragm to be coated. The ivnention can produce in batch size of the compound speaker diaphragm coated with diamond like film in various shape specifications with good performances. The invention raises the frequency response characteristics of the speakers and improves the sound quality.

Description

technical field [0001] The invention relates to a method for depositing a diamond-like film layer. In particular, it relates to a method for depositing a diamond-like film layer on a loudspeaker diaphragm. Background technique [0002] Due to the limitations of the high-frequency diaphragm material in the playback system of modern audio equipment, its high-frequency speakers are not satisfactory, which has become an important obstacle to improving the overall performance of high-fidelity audio equipment. Therefore, the development of new tweeter diaphragm materials and the development of high-quality tweeters have become one of the research directions in the material and electroacoustic circles at home and abroad. [0003] Diamond-Like Carbon films (DLC) is an amorphous carbon film containing a diamond structure, which has similar properties to diamond: low specific gravity (1.8g / cm 3 ), large elastic modulus (Young's modulus E is 3.1~6.0×10 11 Pa), high sound velocity (1...

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Application Information

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IPC IPC(8): C23C14/06H04R7/06
Inventor 袁镇海林松盛侯惠君李似聪朱霞高
Owner GUANGZHOU RES INST OF NON FERROUS METALS
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