Fingerprint sensor if selected
Select a capacitive fingerprint sensor hypothesis for discovery; biometric target, enclosure location and security validation remain open 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 |
|---|---|---|---|
| Fingerprint electrode array | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Sensor readout die | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Chip package substrate | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Chip packaging equipment | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Cleaning equipment | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Sensor calibration equipment | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Electrical instruments | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Chip bonding wire | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Die attach material | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Chip encapsulation compound | Part | incorporated or consumed; allocation not yet specified | Cycle-checked; compatibility unknown |
| Cleanroom | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Electrostatic protection | Tool | reused equipment | Cycle-checked; compatibility unknown |
| Jigs and fixtures | Tool | reused equipment | Cycle-checked; compatibility unknown |
Making outline
- Select a capacitive fingerprint sensor hypothesis for discovery; biometric target, enclosure location and security validation remain open
- 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
- Identified requirement; no researched making route or qualified output yet.
- Discovery hypothesis only: quantitative demands, full recipe, quantities, losses, compatibility and acceptance remain to be researched.
- Selected wirebond package hypothesis does not establish flagship I/O density, power delivery, size or thermal capability; flip-chip bump/underfill architecture is a separate OR alternative requiring its own complete inventory.
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
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