### Original citation matrix

By Huitai PCB. Version 1.0-repair-1. Original editorial synthesis for hardware engineers and buyers preparing evidence for assessment of opened, leftover or customer-supplied moisture-sensitive components before an intended reflow batch.

Orbbec's glossary defines printed circuit board assembly, abbreviated PCBA, as a fully assembled printed circuit board with electronic components mounted and soldered onto it. This is terminology background, not moisture-handling guidance or evidence of manufacturing capability. [Orbbec, Gemini 305 Datasheet V1.0, 6 January 2026, page 6, Glossary, hosted by DigiKey](https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/8888/Orbbec_Gemini-305-Datasheet.pdf).

In NXP's covered package guidance, moisture sensitivity level, abbreviated MSL, indicates a component's floor life, storage conditions and handling precautions after its original container is opened. Floor life describes the permissible period outside the moisture barrier bag before final solder reflow. These explanations do not determine the classification or allowed exposure of an actual project part. [NXP, Assembly guidelines for quad flat no-lead and small outline no-lead packages, Rev. 9, 28 April 2021, page 38, section 10.2](https://www.nxp.com/docs/en/application-note/AN1902.pdf).

Texas Instruments describes a humidity indicator card, abbreviated HIC, as a card packaged with desiccant in the sealed moisture barrier bag of its moisture-sensitive components. Its indication after opening helps identify excessive moisture in the report's handling decision; the card describes its color interpretation. An observation is not a measurement of component moisture content or proof of successful drying. [Texas Instruments, AN-2029 Handling and Process Recommendations, SNOA550H, revised June 2020, page 3, section 3; page 8, section 7](https://www.ti.com/lit/an/snoa550h/snoa550h.pdf).

All evidence requests, decision states and responses in this matrix are engineering recommendations. Supplier facts retain their stated product scopes. Complete records support submission for assessment; they do not establish qualification, successful treatment or permission to reflow.

| Stable row reference | Review item | Evidence to prepare — recommendation | Supplier basis and scope | Decision response and responsibility — recommendation |
| --- | --- | --- | --- | --- |
| matrix-row-part-and-label | Part and label | Match each remaining lot to its full orderable part number, manufacturer, package identification and associated labels. Connect these records to applicable current device and packing documents, and identify which material each record describes. | Texas Instruments connects packing labels and device information with MSL and floor life for its covered plastic surface-mount integrated-circuit packages: [SNOA550H, revised June 2020, page 3, section 3](https://www.ti.com/lit/an/snoa550h/snoa550h.pdf). NXP describes MSL and maximum allowed peak body temperature on caution labels for its covered quad flat no-lead and small outline no-lead packages: [Assembly guidelines, Rev. 9, 28 April 2021, page 38, section 10.2](https://www.nxp.com/docs/en/application-note/AN1902.pdf). Actual part applicability remains to be confirmed. | Identify missing or mismatched records and request clarification. Designate the project party who confirms product and document applicability. When the records match, mark them as evidence ready to submit for assessment; this state grants no batch release. |
| matrix-row-exposure-and-storage | Exposure and storage | Assemble first and subsequent opening times, individual exposure periods, recorded temperature and humidity, storage transitions, resealing records, actual HIC observations and previous treatment history. Mark undocumented periods and retain raw history separately from any proposed calculation. | Texas Instruments defines floor life from bag opening to final reflow and relates bag-out storage to its handling guidance: [SNOA550H, page 3, section 3; page 4, section 4](https://www.ti.com/lit/an/snoa550h/snoa550h.pdf). NXP connects MSL with floor life, storage and post-opening precautions: [Assembly guidelines, pages 38–39, section 10.2](https://www.nxp.com/docs/en/application-note/AN1902.pdf). STMicroelectronics describes time, environment and opening within its covered ECOPACK2 microcontroller and microprocessor guidance: [Soldering recommendations and package information, Rev. 10, July 2026, pages 14–15, sections 6–6.2](https://www.st.com/resource/en/application_note/an2639-soldering-recommendations-and-package-information-for-leadfree-ecopack-mcus-and-mpus-stmicroelectronics.pdf). These relationships establish no common exposure algorithm. | Mark missing or inconsistent history as records needing supplementation, identify the requested contributor and designate who reconciles history against applicable guidance. Pause progression toward release while records or conditions remain unresolved. Do not infer favorable exposure, storage credit, a resealing reset or component eligibility. |
| matrix-row-treatment-and-carrier | Treatment and carrier | Request applicable device guidance, exposure history, actual HIC evidence where relevant, proposed or previous treatment method, package dimensions and construction, carrier identity and documented limits, material and thermal limits, intended process settings and execution records. | Texas Instruments qualifies drying guidance by thickness, MSL, temperature, exposure and package construction: [SNOA550H, pages 8–9, section 7 and Table 5 Notes 1–5](https://www.ti.com/lit/an/snoa550h/snoa550h.pdf). NXP says tray ratings must not be exceeded during baking and tape-and-reel carriers are not designed for high-temperature baking: [Assembly guidelines, pages 42–43, sections 10.4.1–10.4.2](https://www.nxp.com/docs/en/application-note/AN1902.pdf). STMicroelectronics' dry-pack opening guidance has its own product, atmosphere and carrier context: [Soldering recommendations and package information, page 15, section 6.2](https://www.st.com/resource/en/application_note/an2639-soldering-recommendations-and-package-information-for-leadfree-ecopack-mcus-and-mpus-stmicroelectronics.pdf). No universal recipe, actual carrier rating or treatment outcome is established. | Mark a treatment method needing confirmation when applicability, limits or execution requirements remain unresolved. Designate who confirms the method, execution evidence and final disposition, and pause progression toward release pending that assessment. Previous baking alone establishes no finding of appropriate or successful treatment. |

The three recommended states describe different evidence questions: evidence ready to submit for assessment, records needing supplementation, and a treatment method needing confirmation. They can coexist across rows. The suppliers do not prescribe this unified matrix or a universal pause rule. The actual project must designate responsibility for applicability, history reconciliation, method confirmation and disposition.

Keep each supplier's guidance attached to its products and revision. Texas Instruments' drying qualifications include a worst-case molded-leadframe basis, evidence needed for technically justified departures, potentially longer drying after higher-humidity exposure, thickness-dependent exceptions, large ball-grid-array package diffusion-path distinctions, and blocking-plane or stacked-die restrictions. No reference-table value is adopted here as a procedure. STMicroelectronics' atmosphere and carrier arrangements and NXP's component-removal rework guidance address their own situations; they cannot be combined with those drying references into one method. STMicroelectronics' optimal-results timing advice does not replace another manufacturer's label-related floor life. Unopened shelf-life guidance is not substituted for opening-to-final-reflow floor life.

This matrix establishes no numerical exposure limit, baking setting, cumulative timing algorithm, storage credit, resealing reset, dry-storage conversion or successful-treatment result. Actual labels, history, current device documents, carrier ratings, material and thermal limits, execution results and release authority remain project inputs to confirm. Original applicable standard texts and editions have not been verified here; obtain them and confirm applicability before asserting a normative method, numerical acceptance requirement or conformity. Shared standards references do not provide three independent verifications of a standard. Captured revisions do not guarantee future currency, and no equivalence with another STMicroelectronics document path or revision is asserted.

Method: organize the cited supplier relationships into identification, history and treatment questions; connect each question to requested evidence, a gap response and a project responsibility interface. Separate supplier facts from recommendations and preserve product-specific qualifications. No customer records, factory measurements or executed treatment trials underpin this matrix, and it claims no particular Huitai equipment or handling capability. Third-party documents are cited rather than reproduced.

Huitai PCB; original article and chart copyright: 深圳市会泰精密科技有限公司.

© 2026 深圳市会泰精密科技有限公司. Published under the Huitai PCB brand. Attributed quotation and links are welcome; full article reproduction or copying a complete chart requires permission. Uses permitted by applicable law remain unaffected.