Fingerprint electrode array
Pattern insulated sensing electrodes on a semiconductor die with a selected capacitive layout; no optical fingerprint recipe is mixed in Discovery hypothesis; target capability is unverified.
Discovered · unresearchedClosure: OpenInventory incomplete
Capability requirements and tolerances
Consumer-specific numerical targets, quantities and acceptance limits remain open or incompletely reviewed. No smartphone-grade suitability is claimed. Distinct capability tiers require their own making route and qualification.
Making steps · draft selected for navigation; not a validated fabrication specification.
Known Parts and Tools
The selected route supplies this page's inventory and the map's dependency links from one record. Further requirements may be missing; review flags do not prove physical suitability.
| Requirement | Role | Use | Relationship status |
|---|---|---|---|
| Silicon wafer | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Chip fabrication equipment | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Exposure equipment | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Reticle/master pattern | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Photoresist | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Deposition equipment | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Interconnect deposition stock | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Dielectric precursor stock | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Etching equipment | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Pure water | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Cleanroom | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Optical instruments | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Photoresist developer | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
Making outline
- Pattern insulated sensing electrodes on a semiconductor die with a selected capacitive layout; no optical fingerprint recipe is mixed in
- Develop a bounded process specification and establish earlier availability of every listed physical prerequisite.
- Make trial pieces, measure interfaces and performance with independently established references, and reject incompatible outputs.
What remains unresolved
- Discovery hypothesis only: quantitative demands, full recipe, quantities, losses, compatibility and acceptance remain to be researched.
Earlier research provenance
- proposals/2026-10-08-discovery/electronics/report.md
Used by
Items that directly require this item in their selected inventory.
Paths from Smartphone
These routes together include every item that can lead from Smartphone to this item. Repeated path combinations are collapsed; recipes are omitted.
Shortest route: Smartphone → Sensor system → Fingerprint sensor if selected → Fingerprint electrode array
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