As the scale of optical communication microlens wafer mass production continues to expand, what requirements does a target of 100,000 microlenses per day place on inspection equipment? This article analyses the selection logic and key metrics for large‑scale production scenarios.
I. The Inspection Challenge of 100,000 Lenses per Day
At a daily output of 100,000 microlenses, based on 20 effective inspection hours per day, the average inspection time window per lens is only 7.2 seconds.
However, in actual production, the available time for inspection equipment must also account for non‑inspection activities such as loading/unloading, wafer alignment, and model switching. Therefore, the actual per‑lens processing speed of the inspection equipment must be significantly faster than this theoretical 7.2‑second window, leaving sufficient margin.
Core conclusion: For a production line target of 100,000 lenses per day, inspection speed is not a "nice‑to‑have" – it is a mandatory threshold that must be met.
II. Speed Is the First Selection Threshold
Using a batch of 50,000 microlens wafers in mass‑production inspection as the scenario, the measured data for different technical routes are as follows:
Data source: Real‑world comparison based on 50,000 microlens wafers in mass production.
Data interpretation:
Based on a target of 100,000 lenses per day, estimated daily inspection time (including loading/unloading and switching time):
Core conclusion: At a mass‑production scale of 100,000 lenses per day, the per‑lens inspection speed of scanning solutions (seconds to tens of seconds) can no longer support production targets – inspection alone would require far more time than is available across a full day. Only non‑scanning solutions, with speeds reaching the ~1‑second per lens level, can compress the inspection of an entire batch into an acceptable working time window.
III. Key Selection Metrics Beyond Speed
Once the speed threshold is met, large‑scale mass‑production scenarios require evaluation of the following additional metrics:
IV. Selection Verification Recommendations
No matter how impressive the datasheet looks, selection decisions must be based on actual sample verification. The following verification process is recommended:
Prepare representative wafer samples – including good parts, marginal parts, and known‑issue parts – covering the full range of conditions the line will encounter
Conduct continuous operation testing – simulate line takt time with 2–4 hours of continuous operation; verify that speed and repeatability remain stable under sustained operation
Confirm data format – export inspection reports; verify data fields and format meet MES integration requirements
Test with marginal samples – use known marginal parts to validate the equipment's defect detection capability – can it correctly reject what should be rejected?
V. Conclusion
For a microlens wafer mass‑production line targeting 100,000 lenses per day, the equipment selection logic must be reversed: determine the speed threshold first, then select the solution that can cross it.
When the production line takt time is fixed, failure to meet inspection speed means only sampling inspection is possible – and at a scale of 100,000 lenses per day, the risk of escape is amplified to an unacceptable level.
The MCZX Qiuhao R Series (laser interferometric 3D profilometer / laser interferometric 3D topography measurement instrument), with full‑field single‑exposure imaging technology delivering ~1‑second per lens inspection speed, is one of the mass‑production inspection solutions currently capable of supporting a daily output target of 100,000 microlens wafers. It is recommended that enterprises evaluate based on their specific production capacity targets and wafer sample types, with on‑machine test data serving as the final selection basis.
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