DLC coated aluminum diaphragm for loudspeakers

Applications

DLC coated aluminum diaphragm for loudspeakers

1. Improved Sound Quality

• Wider Frequency Bandwidth: DLC-coated diaphragms extend the high-frequency response by 2–5 kHz.

• Reduced Harmonic Distortion: Harmonic distortion is suppressed to less than 6%, leading to cleaner, more accurate audio reproduction.

• Enhanced Subjective Listening Experience: The sound becomes less sharp and fatiguing, making it more pleasant to the human ear.

2. Enhanced Mechanical Properties

• Increased Hardness: Nanohardness and Vickers hardness are significantly improved, peaking at optimal PECVD bias voltage (−200 V).

• Higher Elastic Modulus: The coating adds stiffness without adding significant mass, helping preserve fast transient response.

3. Better Adhesion and Durability

• W Interlayer Boosts Bonding: The tungsten interlayer improves the adhesion of the DLC film to the metal substrate by 2.5 times, preventing delamination and enhancing long-term durability.

• Wear and Scratch Resistance: The hard DLC surface resists mechanical wear and micro-abrasion, extending diaphragm lifespan.

4. Thermal Stability

• DLC coatings provide good thermal resistance, which helps maintain performance under demanding acoustic loads or high-power operation.