SEMI International Standards
Standards New Activity Report Form (SNARF)
Date Prepared: 03/25/2022Revised (if Applicable):

Document Number: 6922
SNARF for: New Standard: Classification of Reusable Silicon Material

Originating Global Technical Committee: Photovoltaic (PV) - Materials
Originating TC Chapter: China
Task Force (TF) in which work is to be carried out: PV Silicon Wafer Task Force
Note: If a new task force is needed, also submit a task force organization form (TFOF)

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1. Rationale:
a. Describe the need or problem addressed by this activity.
(Indicate the customer, what benefits they will receive, and if possible, quantify the impact on the return on investment [ROI] if the Document is implemented.)
According to public statistics, the global PV installing in 2021 exceed 160GW, bringing the market to exceed 300 billion yuan per year.
Silicon is widely used in photovoltaic industries. In 2020, the demand for polysilicon in photovoltaic industries has exceeded 450,000 tons and are still increasing. Silicon-based PV industry produces a large number of polysilicon or related by-products, a considerable part of which can be recycled after the corresponding treatment, so it is also called reusable silicon material (hereinafter referred to as reusable silicon material).
According to the public data, the actual capacity of silicon wafers in Mainland China has exceeded 300GW by the end of 2021, and the nominal capacity of polysilicon will exceed 700,000 tons by the end of 2022. The reusable silicon material in photovoltaic industry is produced in crystal growing and slicing. Since the current PV technology is mostly Cz method, considering the yield, cutting loss from round brick to squared brick, crushing loss, kerf loss, etc., the reusable silicon material produced by silicon wafer manufacturer by the end of 2022 will be more than 250,000 tons.
Therefor it is necessary to establish a reasonable standards to regulate the use of reusable silicon materials. By using these kinds of silicon material, not only the material cost and the comprehensive cost of industrial chain can be reduced, but also the utilization rate of resources and energy can be improved.



b. Estimate effect on industry.
2: Major effect on an industry sector - identify the relevant sector
Sector or Company Information: Wafer

c. Estimate technical difficulty of the activity.
II: Some Difficulty - Disagreements on known requirements exist but developing consensus is possible

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2. Scope:
a: Describe the technical areas to be covered or addressed by this Document development activity. For Subordinate Standards, list common concepts or criteria that the Subordinate Standard inherits from the Primary Standard, as well as differences from the Primary Standard:
This standard is applicable to the usage of reusable silicon materials produced in silicon crystal growing and slicing process.

b: Expected result of activity
New Standard or Safety Guideline (including replacement of an existing Standard or Safety Guideline)

For a new Subordinate Standard, identify the Primary Standard here:




For Standards, identify the Standard Subtype below:
Specification

Miscellaneous (describe below):

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3. Projected Timetable for Completion:

a: General Milestones
a. Activity Start: 04/01/2022b. 1st Draft by: 09/01/2022
c. (Optional) Informational Ballot by: d. Letter Ballot by: 12/01/2022
e. TC Chapter Approval By:04/30/2023

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4. Liaisons with other Global Technical Committees/TC Chapters/Subcommittees/TFs:
a. List SEMI global technical committees, TC Chapters, subcommittees, or task forces in your or other Regions/Locales that should be kept informed regarding the progress of this activity. (Refer to SEMI Standards organization charts and global technical committee charters and scopes as needed.)


b. List any planned Type I Liaisons with external nonprofit organizations (e.g., SDO) that should receive Draft Documents from Standards staff for feedback during this activity and be notified when the Letter Ballot is issued (refer to Procedure Manual § 7):


c. Intercommittee Ballots:
will be issued – identify the recipient global technical committee(s):

Identify the recipient global technical committee(s):
Photovoltaic (PV) - Materials
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5. Safety Considerations:
The resulting document is expected:
NOT to be a Safety Guideline

NOTE FOR "to be a Safety Guideline": When all safety-related information is removed from the Document, the Document is NOT technically sound and complete - Refer to Section 15.1 of the Regulations for special procedures to be followed.

NOTE FOR "NOT to be a Safety Guideline": When all safety-related information is removed from the Document, the Document is still technically sound and complete.

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6. Intellectual Property Considerations:
Note: Both a: and b: below should be checked for Revision of existing Standard(s) and Safety Guideline(s).

a. For a new Standard or Safety Guideline and for any part to be modified or added in a Revision of published Standards and Safety Guidelines:
the use of patented technology is NOT required.

If "patented technology is intended to be included in the proposed Standard(s) or Safety Guideline(s) " is selected above, then also check one:


b. For Revision, Reapproval, Reinstatement, or Withdrawal of existing Standard(s) and Safety Guideline(s):


c. The body of the Document and any Appendices, Complementary Files, Related Information sections, or Various Materials that may or may not be a part of the Document by reference:



NOTE FOR ‘the use of patented technology or the incorporation of Copyrighted Item(s) is NOT required’: If in the course of developing the Document, it is determined that the use of patented technology or Copyrighted Item(s) is necessary for the Document, the provisions of Regulations § 16 must be followed.

NOTE FOR ’will incorporate Copyrighted Item’: A copyright release letter must be obtained from the copyright owner prior to publication.

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7. Comments, Special Circumstances:
None.

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8. TC Member Review:
took place between (put dates below) before approval by the GCS, or

Member Review Start Date; 2022/3/31
Member Review End Date: 2022/4/13

NOTE FOR ‘TC Member Review’ is required by the Regulations for a period of at least two weeks
before approval of a new, or a major revision of an existing, Standard or Safety Guideline. (Refer to Regulations ¶ 8.2.1)
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9. SNARF Approval Dates:
TC Chapter or GCS04/15/2022
Recorded in TC Minutes

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10. SNARF Extension Dates:
TC Chapter Extension Granted on
Extension Expires on