GB/T 34479-2017Specification for alphanumeric marking of silicon wafers (English PDF)
硅片字母数字标志规范
This is a limited preview
Buy now to download the full PDF (15 pages)
Need quotation for your management?
Get a formal quotation for GB/T 34479-2017 in 30 minutes.
Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 14, 2017
Implementation date
July 1, 2018
Scope
GB/T 34479-2017 is the English-translated version of 硅片字母数字标志规范.
GB/T 34479-2017 is the Chinese standard "Specification for alphanumeric marking of silicon wafers".
Its scope clause reads: This standard specifies the encoding of alphanumeric symbols on silicon wafers or other semiconductor wafers, including the shape and size of the emblem, the number of letters Word code definition, requirements and alphanumeric code error checking methods.
This standard applies to the wafer and other chips on the front or back of the coding signs. Note. Alphanumeric signs and associated information are stored in the database and can be independently and quickly identified by a simple automated optical character reading (OCR) instrument or manually Chip manufacturer consistency with wafer markings. Its clauses include terms and definitions; logo shape and size.
Found what you need?
Document preview — GB/T 34479-2017
National Standard of the People's Republic of China
- ICS
- 29.045
- Classification
- H 80
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 logo shape and size
1 Scope
This standard specifies the encoding of alphanumeric symbols on silicon wafers or other semiconductor wafers, including the shape and size of the emblem, the number of letters
Word code definition, requirements and alphanumeric code error checking methods.
This standard applies to the wafer and other chips on the front or back of the coding signs.
Note. Alphanumeric signs and associated information are stored in the database and can be independently and quickly identified by a simple automated optical character reading (OCR) instrument or manually
Chip manufacturer consistency with wafer markings.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 14264 semiconductor materials terminology
SEMIAUX001 List of Vendor Identification Numbers
SEMIAUX015 Automatic Optical Character Reading Character Overview (SEMIOCRcharacteroutlines)
3 Terms and definitions
GB/T 14264 and defined by the following terms and definitions apply to this document.
3.1 Character spacing
The horizontal distance between adjacent borders of any character.
3.2 Character spacing
Horizontal distance between character centerlines of adjacent characters.
3.3 Character tilts
Character inclination between the baseline of the character and the parallel lines at the bottom of the character's window.
3.4 Adjacent character misalignment
Radj
Vertical distance between character baselines of two adjacent characters on the same line.
3.5 Line character misalignment
Rline
The vertical distance between the baselines of the highest and lowest characters in the same line.
4 logo shape and size
4.1
characters can be written using solid line or dot matrix method, the minimum lattice size should be horizontal 5 points, vertical 9 points, as shown in Figure 1 […]
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
How to Download GB/T 34479-2017
- 1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
- 2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
- 3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
- 4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.
Related Standards
GB/T 10003-2026 — Biaxially oriented polypropylene (BOPP) film
GB/T 10004-2026 — Plastic/Plastic laminated films and pouches for packaging
GB/T 10007-2026 — Rigid cellular plastics - Determination of shear properties
Secure payment via Stripe
Payments accepted
GB/T 34479-2017
$195.00