SEMI International Standards
Standards New Activity Report Form (SNARF)
Date Prepared: 03/16/2021Revised (if Applicable):

Document Number: 6767
SNARF for: New Standard: Test Method for Flatness of Silicon Carbide Wafers by Optical Interference

Originating Global Technical Committee: Compound Semiconductor Materials
Originating TC Chapter: China
Task Force (TF) in which work is to be carried out: Silicon Carbide Substrate 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.)

The flatness of Silicon Carbide substrates critically determines the flatness and quality of the deposited epitaxial layer. Large flatness error can cause stacking faults in the epitaxial layer and concerns the control of post device preparation processes. The quality of the device will be compromised accordingly.



b. Estimate effect on industry.
2: Major effect on an industry sector - identify the relevant sector
Sector or Company Information: Directly affect silicon carbide substrate and epitaxy companies, and indirectly affect silicon carbide device companies

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 flatness test method of 4H and 6H crystalline silicon carbide wafers at room temperature;
The standard stipulates the principle, equipment, testing procedures, etc. of the testing method for silicon carbide single crystal polished wafers.


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: 04/01/2021b. 1st Draft by: 06/01/2021
c. (Optional) Informational Ballot by: d. Letter Ballot by: 12/01/2021
e. TC Chapter Approval By:06/01/2024

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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 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 (see Procedure Manual 7):


c. Intercommittee Ballots:
will not be issued

Identify the recipient global technical committee(s):

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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:
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:
the incorporation of Copyrighted Item will NOT be required



NOTE FORthe 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 FORwill 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:

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

Member Review Start Date; 03/22/2021
Member Review End Date: 04/06/2021

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. (See Regulations 8.2.1)
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9. SNARF Approval Dates:
TC Chapter or GCS04/08/2021
Recorded in TC Minutes04/08/2021

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

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