SEMI International Standards
Standards New Activity Report Form (SNARF)
Date Prepared: 02/01/2017Revised (if Applicable):

Document Number: 6194
SNARF for: New Standard: Test Method for Determination of Hydrogen in PV Polysilicon by Inert Gas Fusion Infrared Absorption Method

Originating Global Technical Committee: Photovoltaic (PV) - Materials
Originating TC Chapter: China
Task Force (TF) in which work is to be carried out: PV Silicon Raw Materials 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.)
Hydrogen content of PV polysilicon has an effect on the safety of casting process for polycrystalline silicon ingot and on the quality of polysilicon ingot. PV polysilicon may contain hydrogen because of hydrogen being used during the manufacture. The granular polycrystalline silicon produced by fluidized bed process, which has the properties of less investment and low productive cost, get more and more applications in casting polycrystalline silicon ingot. The granular polycrystalline silicon may contain hydrogen because of hydrogen being reduction incompletely during the process. So it is necessary to control the hydrogen content in PV polysilicon especially in the granular polycrystalline silicon produced by fluidized bed process for both manufacturer and customer involving PV polysilicon and polycrystalline silicon ingot.
Upon researching, no reported test method or standard has been created in this subject, which causes variations in product quality. Through summarizing the requirements from several solar-grade polycrystalline silicon manufacturers and combining technical requirements, we will develop a standardized test method to determine hydrogen content in PV polysilicon especially in the granular polycrystalline silicon produced by fluidized bed process via inert gas fusion infrared absorption method.


b. Estimate effect on industry.
2: Major effect on an industry sector - identify the relevant sector
Sector or Company Information: PV polysilicon suppliers，Polysilicon manufacturers, polycrystalline silicon ingot suppliers, polycrystalline silicon ingot manufacturers, PV cell manufacturers

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:
The test method to determine hydrogen in PV polysilicon, involving all types of PV polysilicon, e.g. granular polycrystalline silicon produced by fluidized bed process or PV polysilicon wafers and slugs etc. Based on the same matrix and instruments, the test method may also be used for determining hydrogen in other silicon materials covering PV monosilicon, semiconductor monosilicon and semiconductor polysilicon, silicon raw materials including metal silicon and silicon powder, etc.

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:
Test Method

Miscellaneous (describe below):

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3. Projected Timetable for Completion:

a: General Milestones
a. Activity Start: 04/01/2017b. 1st Draft by: 09/01/2017
c. (Optional) Informational Ballot by: d. Letter Ballot by: 12/01/2017
e. TC Chapter Approval By:10/01/2018

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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.)
Photovoltaic committee

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
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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:
will NOT include reproduced copyrighted material



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 at the TC Chapter Meeting, or

Member Review Start Date; 2017/3/21
Member Review End Date: 2017/4/4

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 GCS04/18/2017
Recorded in TC Minutes05/02/2017

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