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GB/T 46381-2025Low radioactive spherical silica powder for integrated circuit packaging (English PDF)

集成电路封装用低放射性球形氧化硅微粉

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

October 31, 2025

Implementation date

February 1, 2026

Scope

GB/T 46381-2025 is the English-translated version of 集成电路封装用低放射性球形氧化硅微粉.

GB/T 46381-2025 is the Chinese standard "Low radioactive spherical silica powder for integrated circuit packaging". Its scope clause reads: This document specifies the classification, marking, requirements, inspection rules, and labeling of low-radioactivity spherical silica micropowder for integrated circuit packaging.

Packaging, transportation, and storage are described, along with the corresponding testing methods. This document applies to the preparation of aggregates using flame melting, high-temperature melt spraying, high-temperature oxidation, plasma methods, or liquid-phase synthesis.

Low-radioactivity spherical silica micropowder for circuit packaging. Its clauses include terms and definitions.

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Document preview — GB/T 46381-2025

National Standard of the People's Republic of China

ICS: 31.030
Classification: L 90

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Classification and Labelling
4.1 Product Category
4.2 Mark
5 Requirements
5.1 Product Appearance
5.2 Cutting Point
5.3 Main physical and chemical properties
6.Test Methods
6.1 Test Environment
6.2 Visual Inspection
6.3 Particle content and maximum particle size above the cut point
6.4 Median particle size
6.5 Radioactive element content (U, Th)
6.6 Specific surface area
6.7 Mean sphericity
6.8 Moisture content
6.9 Loss on ignition
6.10 True Density
6.11 Extract conductivity
6.12 Extract pH
6.13 SiO2 content
6.14 Al2O3 content
6.15 Fe2O3 content
6.16 Crystalline SiO2 content.
6.17 Na content in the extract.
6.18 Anion content in the extract (Cl-, NO3-, SO42-, PO43-).
6.19 Magnetic foreign objects
7.Inspection Rule
7.1 Inspection Classification
7.2 Batching
7.3 Inspection Item
7.4 Judgment Rule
8.Marking, Packaging, Transport and Storage
8.1 Mark
8.2 Packaging
8.3 Transportation
8.4 Storage

1 Scope

This document specifies the classification, marking, requirements, inspection rules, and labeling of low-radioactivity spherical silica micropowder for integrated circuit packaging.

Packaging, transportation, and storage are described, along with the corresponding testing methods.

This document applies to the preparation of aggregates using flame melting, high-temperature melt spraying, high-temperature oxidation, plasma methods, or liquid-phase synthesis.

Low-radioactivity spherical silica micropowder for circuit packaging.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 191 Packaging and Storage Graphic Symbols

GB/T 6284 General Method for Determination of Moisture in Chemical Products - Loss on Drying Method

GB/T 6678 General Rules for Sampling of Chemical Products

GB/T 6682 Specifications and test methods for water used in analytical laboratories

GB/T 6908 Analytical Methods for Boiler Water and Cooling Water - Determination of Conductivity

GB/T 9724 General Rules for the Determination of pH Value of Chemical Reagents

GB/T 11446.7 Ion Chromatographic Determination of Trace Anions in Electronic Grade Water

GB/T 13390 Determination of specific surface area of metal powders by nitrogen adsorption method

GB/T 14506.30 Chemical Analysis Methods for Silicate Rocks - Part 30.Determination of 44 Elements

GB/T 14640 Determination of potassium and sodium content in industrial circulating cooling water and boiler water

GB/T 19077 Particle size analysis by laser diffraction

GB/T 32661 Spherical Silica Micropowder

GB/T 36655 Test method for alpha-state crystalline silica content in spherical silica micropowder for electronic packaging - XRD method

GB/T 37406 Method for Determining the Sphericity of Spherical Silica Micropowder for Electronic Packaging - Dynamic Photoelectric Projection Method for Particles

GB/T 39486 General Rules for Inductively Coupled Plasma Mass Spectrometry Analysis of Chemical Reagents

GB/T 40401 Measurement of skeleton density by gas volume displacement method

SJ/T 3228.3 High-purity quartz sand for electronic products - Part 3.Determination of loss on ignition

SJ/T 3228.4 High-purity quartz sand for electronic products - Part 4.Determination of silica

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 sphericity

The degree to which a single particle's planar projection image approximates a standard circle.

[Source. GB/T 37406-2019, 3.1] […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 17 pages — is available in the English PDF.

Referenced standards

Normative references

Editions of GB/T 46381

Edition	Title	Revision	Status
GB/T 46381-2025	Low radioactive spherical silica powder for integrated circuit packaging	current edition	Current

This page sells the current edition, GB/T 46381-2025. Earlier editions are listed for reference only.

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