Part · radio

Radio filters and duplexers

Wirebond selected SAW dies into unloaded cavity packages Discovery hypothesis; caller demands and physical qualification remain open.

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
Radio acoustic filter die	Part	incorporated; allocation and losses open	Cycle-checked; compatibility unknown
Acoustic filter package carrier	Part	incorporated; allocation and losses open	Cycle-checked; compatibility unknown
Acoustic filter cavity lid	Part	incorporated; allocation and losses open	Cycle-checked; compatibility unknown
Die attach material	Part	consumed; replenishment and waste open	Cycle-checked; compatibility unknown
Chip bonding wire	Part	consumed; replenishment and waste open	Cycle-checked; compatibility unknown
Solder alloy	Part	consumed; replenishment and waste open	Cycle-checked; compatibility unknown
Chip packaging equipment	Tool	reused fabrication equipment; availability unqualified	Cycle-checked; compatibility unknown
Joining equipment	Tool	reused fabrication equipment; availability unqualified	Cycle-checked; compatibility unknown
Radio test equipment	Tool	reused for verification/calibration; independent origin required	Cycle-checked; compatibility unknown
Pressure instruments	Tool	reused for verification/calibration; independent origin required	Cycle-checked; compatibility unknown
Workshop surfaces	Tool	reused fabrication equipment; availability unqualified	Cycle-checked; compatibility unknown
Containers	Tool	reused fabrication equipment; availability unqualified	Cycle-checked; compatibility unknown
Handling assembly	Tool	reused fabrication equipment; availability unqualified	Cycle-checked; compatibility unknown
Cleanroom	Tool	reused facility/utility capacity; earlier supply required	Cycle-checked; compatibility unknown
Cleaning equipment	Tool	reused fabrication equipment; availability unqualified	Cycle-checked; compatibility unknown
Pure water	Part	consumed; replenishment and waste open	Cycle-checked; compatibility unknown
Ventilation	Tool	reused fabrication equipment; availability unqualified	Cycle-checked; compatibility unknown

Making outline

Attach SAW die and wirebond its RF pads inside carrier.
Seal lid using one solder-perimeter hypothesis while maintaining empty acoustic region.
Measure pass/reject response, power/thermal effects and cavity seal behavior.

What remains unresolved

Making route and target-level requirements not researched.
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.
Lid solder flux removal, seal atmosphere and leak method not specified; duplexer band allocation unresolved.
Full inventory, quantities, losses, capability compatibility and acceptance remain unreviewed.

Unselected discovery proposals

These are research questions, not published manufacturing dependencies. The seed combines alternatives, operating requirements and verification relationships.

MEMS fabrication, Ceramics stock, Deposition equipment, Chip packaging equipment, Radio test equipment

Sources and leads

Source scope and research notes determine which claims have been checked. A URL does not establish a complete making route.

Murata SAW structure and manufacturing

Canonical reuse assessment

{
  "existing_candidates_checked": [
    "rf-filters"
  ],
  "decision": "Remove generic molded encapsulant touching acoustic surface; canonical SAW package retained.",
  "availability": "No candidate is asserted built or suitable; qualification, copies, cleanliness and schedule remain open.",
  "identity_search": "Canonical IDs, aliases/functions and all JSON proposals searched before new ID request; approved for staging by coordinator."
}

Proposed capability specification

{
  "function": "Wirebond selected SAW dies into unloaded cavity packages",
  "quantity_dimensions": "not yet specified",
  "performance_precision_purity": "not yet specified",
  "interfaces_environment": "not yet specified",
  "acceptance": "Trial pieces must meet caller demand with independent references; numerical limits not yet specified."
}

Earlier research provenance

proposals/2026-10-08-discovery/electronics/report.md
proposals/2026-10-08-discovery/camera-rf/report.md; coordinator candidate-union revision 2

Return to the discovered map

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 → Main board → Board passives → Radio filters and duplexers

Enable JavaScript to see the routes covering every contributing item.