Precision Metrology for Cosmetics Microstructures

2024

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Materials/computational design R&D and machine validation platform used to rapidly develop cosmetics designs, novel polymers, and calibrate AM equipment.

Role & Scope: Drove parametric design of ISO/ASTM 52902 test artifacts; developed automated metrology programs; developed machine calibration techniques; implemented site-wide First Article Inspection and Statistical Process Control.

Proof

Capabilities: Instituted SPC on priority CTQs (design fidelity; tear/tensile) FAI artifacts in production + R&D use • MSA screen completed

Business impact: enabled $2M+ in revenue (FY24-25); product line earned BeautyMatters “Innovator of the Year” award.

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Methods & Capability

  • Automated metrology: developed parametric ASTM 52902 + micro-tensile/tear artifacts. Used for polymer development, computational design, and production initiatives.
  • Rapid calibration: developed AM equipment calibration processes, reducing calibration time from 1 day → 1 hour, and significantly increasing the quantity and quality of production data.
  • Statistical Process Control: tied automated metrology system to SPC dashboards, enabling predictive equipment maintenance and site-wide quality visibility
  • Design Transfer: SOPs + Documentation for Quality inspection, Safety, and QMS handoff.
  • Integrated Quality Controls: (GR&R pre-check, FAI on recipe change, go/no-go gates) ensured repeatability and traceability within QMS.

Process

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No parameter tuning during production FAI; all corrections re-verified before production/material/design screening resumes

CTQMeasurement ProcessGateTrigger + First Fix
Dimensional fidelity across buildISO/ASTM 52902 artifact; scripted per-feature error mapWithin validated window across bed; outliers rare and isolatedClustered high error region → recalibrate (focus/exposure/fluid) machine → requalify FAI
Feature retention (smallest + largest features)Automated count vs nominal on couponAll target features at intended scalesSystemic loss of smallest/largest features → confirm focus/dose within offsets → requalify FAI
Fiber straightnessAutomated positional deviation across fibersLow fiber deviation vs straightness baseline>20% fibers above straightness baseline → confirm post-process traveler accuracy, increase exposure one step within validated window → requalify FAI

Other variables monitored: Intra-fiber dimensional fidelity, film thickness uniformity, feature circularity, tear/tensile strength (ASTM D1708/D624), residue (UV-Vis), environment (temperature, RH, light) - to distinguish machine vs material

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