To achieve fast and efficient vacuum coating and sampling, optimization is required from multiple aspects such as equipment, process, materials, and management. Here are some key strategies:

1. Pre preparation optimization

• Clarify requirements

  • Confirm key parameters such as substrate type, film layer material, thickness, and uniformity to avoid repeated adjustments.

  • Provide clear sample drawings or technical specifications to reduce communication costs.

• Material pretreatment

  • Complete substrate cleaning in advance (such as ultrasonic cleaning, plasma cleaning) to avoid temporary treatment before coating.

  • Prepare the membrane materials (target material, evaporation source) in advance to ensure purity and size match the equipment requirements.

2. Equipment and process optimization

• Choose the appropriate coating technology

  • Small area/simple film layer: using thermal evaporation (resistance evaporation or electron beam evaporation), fast speed and low cost.

  • Complex/high-precision film layer: using magnetron sputtering or ion plating, although the equipment cost is high, the film quality is good, reducing rework.

• Rapid target switching design

  • Using modular target material supports to shorten material replacement time.

  • Multi target devices can be pre installed with different materials simultaneously, reducing the number of cavity openings.

• Pre validation of process parameters

  • Use simulation software (such as COMSOL) to simulate the coating process and optimize parameters (power, air pressure, temperature) in advance.

  • Establish a historical process database and directly call mature parameters for similar requirements.

• Rapid Vacuum Extraction Technology

  • Choose a combination of dry pump and molecular pump to reduce oil pollution and accelerate vacuum pumping.

  • The cavity design is compact, reducing dead volume, or using a load lock to avoid frequent deflation of the main cavity.

3. Automation and Intelligence

• Automated control

  • Using PLC or computer to control the coating process, automatically adjusting power, gas flow rate, etc., to reduce human error.

  • Integrated film thickness monitoring (such as quartz crystal oscillator, optical monitoring), real-time feedback adjustment of plating speed.

• Quick sample fixture

  • Design universal or quick clamping fixtures that support simultaneous coating of multiple samples (such as rotating planetary carriers).

  • Use 3D printing custom fixtures for irregular substrates to shorten the adaptation time.

4. process management

• Parallel Jobs

  • Simultaneously prepare the next batch of samples or analyze the plated samples while vacuuming or coating the equipment.

  • Establish standard operating procedures (SOP) to reduce human operation delays.

• Quick detection and feedback

  • Equipped with in-situ testing (such as ellipsometer, spectrometer), evaluate performance immediately after coating.

  • If it is not qualified, priority should be given to adjusting key parameters (such as power, time) rather than a comprehensive retry.

5. Other Skills

• Small batch trial plating

  • First, plate 1-2 samples to verify the parameters, and then expand the batch after confirmation.

• Collaboration and Outsourcing

  • If the self-developed cycle is long, a professional coating factory can be commissioned (they have a rich process library and fast sampling services).

Example process (electron beam evaporation sampling)

1. Day 1：Confirm requirements → substrate cleaning → target material installation.

2. Day 2：Vacuum extraction (2 hours) → Pre melting target material (degassing) → Coating (30 minutes) → In situ testing.

3. If qualified: batch coating; If adjusted: only modify the coating time/power, retry the next day.

By using the above methods, the traditional sampling cycle (1-2 weeks) can be shortened to 3-5 days, while improving the success rate. The core is to reduce non coating time (such as vacuuming and target changing), optimize process stability, and utilize automation tools.