Evidence note: No customer order, batch inspection record, manufacturing traveler, or film-performance dataset was available in the project repository. This page is therefore a procurement and handling guide, not a documented manufacturing case or a promise of deposition results.
Strontium oxide (SrO) is a reactive oxide source material whose target specification must cover more than nominal composition. A useful request for quotation defines chemistry, dimensions, mounting configuration, acceptance criteria, packaging, and the user’s storage and installation constraints. Film properties remain dependent on the complete deposition process and cannot be guaranteed by the target specification alone.
Why SrO Needs Controlled Handling
SrO reacts with water and can form strontium hydroxide; reference summaries also report conversion toward hydroxide or carbonate during air exposure. That makes packaging and exposure history relevant procurement inputs rather than afterthoughts. Buyers should obtain the current safety data sheet, complete a site-specific risk assessment, and define how the material will be opened, stored, installed, and discarded.
Do not treat a visibly intact target as proof that its surface chemistry is unchanged. If exposure control matters to an experiment, the acceptance plan should state the packaging atmosphere, seal condition, desiccant or moisture-control requirement, and maximum acceptable time between opening and installation.
Define the Target Before Manufacturing
| RFQ field | What to specify | Why it matters |
|---|---|---|
| Material identity | SrO; requested assay and impurity-reporting basis | “High purity” is not a substitute for a numeric, testable requirement |
| Geometry | Diameter or L × W, thickness, tolerances, edge detail | Controls fit, clamping, and machining acceptance |
| Cathode interface | Tool model, pocket size, backing plate, keeper ring, clamp details | A nominal diameter alone may not establish compatibility |
| Configuration | Unbonded or bonded; backing material and allowable bond system | Changes the mechanical and thermal interface |
| Inspection | Dimensions, flatness if needed, visual criteria, documentation | Turns general quality language into acceptance criteria |
| Packaging | Seal, atmosphere, moisture control, labeling, opening procedure | Limits uncontrolled exposure after inspection |
The public Strontium Oxide Sputtering Target page is the commercial product owner. This guide supports specification and handling intent; it does not replace the product quotation.
Density, Porosity, and Mechanical Acceptance
Ceramic target density should be expressed with both a requested value and an agreed measurement basis. Apparent density, bulk density, and relative density are not interchangeable unless the reference value and method are defined. The supplier should not infer an acceptance threshold from a generic percentage.
Visual acceptance should address cracks, edge chips, open surface defects, contamination, and any allowable cosmetic variation. Dimensional acceptance should state the measurement temperature and the required tolerances. If flatness, parallelism, or surface finish affects the cathode interface, include those values on the drawing.
Bonded or Unbonded?
The correct configuration depends on the cathode design, target thickness, cooling path, power conditions, and the supplier’s qualified bonding options. A bonded assembly also needs a backing-plate drawing, bond-line acceptance, usable-temperature limits, and instructions for clamping or keeper-ring engagement. Do not assume that a bond system qualified for one material and cathode transfers automatically to SrO.
For an unbonded target, the RFQ should define how the target is supported and constrained. Point loading, uneven clamping, debris under the target, or incompatible hardware can create local stress. Installation instructions from the equipment and target suppliers take precedence over generic guidance.
What the Target Can—and Cannot—Control
| Target-side inputs | Deposition-system inputs |
|---|---|
| Declared chemistry and impurity scope | Base pressure and residual gas |
| Geometry and mechanical condition | Process gas, pressure, and flow control |
| Backing and bond configuration | Power mode, ramp, cooling, and duty cycle |
| Surface and packaging condition at release | Substrate, temperature, distance, and post-treatment |
Composition, phase, stress, morphology, and functional properties of an Sr-containing film must be verified on the user’s deposited sample. A target certificate cannot substitute for film characterization.
Receiving and Installation Checklist
- Check the outer package, seal, label, and included documents before opening.
- Compare target and backing dimensions with the purchase drawing.
- Record any visible damage or suspected exposure before installation.
- Follow the current SDS and local controls for corrosive or moisture-reactive material.
- Use the cathode manufacturer’s mounting, cooling, and operating instructions.
- Define a conservative conditioning plan for the actual tool; do not copy an unrelated power recipe.
Copyable SrO Target RFQ
Material: SrO sputtering target. Required assay and impurity reporting: [attach specification]. Target geometry and tolerances: [attach drawing]. Cathode/tool model: [model]. Configuration: [unbonded / bonded], backing and bond requirements: [details]. Required inspection: [dimensions / flatness / visual / other]. Packaging and moisture-control requirement: [details]. Quantity: [ ]. Please identify feasible values, test methods, exclusions, storage instructions, and any information still required before quotation.Technical References
- PubChem: Strontium oxide identity, hazards, and reactivity summary
- TFM SrO sputtering target product page
Send the drawing and specification to TFM for feasibility review. Any proposed purity, density, tolerance, backing, bond, packaging, test method, or lead time must be confirmed in the quotation.
