Sheets
Contact us

Technical Details of Sheets

SCHOTT glass sheets cover an impressive spectrum of technical properties that deliver high performance for a wide variety of applications in a broad range of environments. While our glasses share many of the same outstanding technical qualities, many properties can be customized for individual needs.

Properties to be proud of

Super-flat, super-smooth

SCHOTT’s special flat glass sheets offer flawless surface properties as well as excellent cosmetic qualities, removing the need for further polishing. Highly advanced down-draw and up-draw techniques also produce sheets with excellent TTV properties and outstanding clarity.

Durable and reliable in tough conditions

Glass often needs to withstand high temperatures and challenging conditions. The excellent thermal and chemical resistance of SCHOTT glass sheets ensure durability and reliability, while certain material compositions are made for even higher mechanical loads or requirements because they can be chemically toughened for reliable function in demanding environments.

Excellent transmittance and transparency

High luminous transmittance, a colorless appearance and high transparency are key technical benefits of all our glass sheets. SCHOTT float glasses also possess a highly homogenous quality that ensures consistent performance across numerous applications.

Wide range of thicknesses, shapes and sizes

While SCHOTT’s range of sheet glass encompasses a huge variety of thicknesses, shapes and sizes, we can also produce individual solutions unique to your application. Whether standard or customized, the specifications and technical qualities of all our glasses are never compromised.
Up-drawn sheet dimensions
Down-drawn sheet dimensions
Floated sheet dimensions
Available materials

Up-drawn sheet dimensions

The following specifications are applicable to B 270® glass sheets.

 

1. Formats

Thickness in mm Length x Width in mm x mm Length tolerance in mm Width tolerance in mm
0.9 – 10.0 1680 x 900 ± 20 ± 20
0.9 – 10.0  900 x 840  ± 10  ± 10 

 

2. Geometrical Properties

Thickness in mm Thickness tolerance(1) in mm Local thickness Variation(2) in mm/cm Warp(3) in mm
0.90 – 1.00 ± 0.10 0.015 ≤ 0.48
1.10 – 3.00 

± 0.15 

 0.02  ≤ 0.48 
3.50 – 5.00  ± 0.20  0.022  ≤ 0.48 
5.50 – 8.00  ± 0.30  0.025  ≤ 0.48 
10  ± 0.40  0.035   

(1) Other tolerances on request
(2) Local Thickness Variation according to SEMI MF 1530 GBIR
(3) The maximum deviations of the glass surface from an ideal plane, referred to an area of 320 mm x width.

 

 

3. Glass quality properties 

Properties - General Conditions Specifications
Roughness Ra ≤ 1 nm
Cracks  visible  none 

 

3.1 Spot type and linear defects (e.g. inclusions, bubbles, knots, particles, digs, scratches)

Condition: L: length | W: width | S: Sum of length of all defects | T: Total amount of all defects 

Formats Specifications
1680 x 900 mm

L, W ≤ 0.8 mm: allowed
Either S ≤ 80 mm Or  T ≤ 19 pcs.: allowed
900 x 840 mm  L, W ≤ 0.8 mm: allowed
Either S ≤ 80 mm Or T ≤ 10 pcs.: allowed"

 

3.2 Edge defects (e.g. chips, protrusions)

Condition: Size

Specifications
≤ glass thickness: allowed
> glass thickness: none 

 

3.3 Residual cooling tension

Condition: Stress birefringence

Specifications
0.90 mm – 1.35 mm: ≤ 20 nm/cm
1.65 mm – 3.00 mm: ≤ 30 nm/cm 
3.50 mm – 6.00 mm: ≤ 40 nm/cm 
6.50 mm – 10.0 mm: ≤ 60 nm/cm 

 

3.4 Contaminations

Condition Specifications
Inspection condition:
over head light source,
dark environment,
duration 15s / pc.,
uncleaned		 Contaminations (e.g. glove marks, conveyor belt marks, paper marks, haze, cullet's, dust etc.)
which are cleanable by a standard cleaning process at customer side will be ignored and are permissible without any size restriction.

 

3.5 Quality assurance

Condition Specifications
AQL according to ISO 2859 SPC for geometrical properties

Down-drawn sheet dimensions

The following specifications are relevant for D 263® T eco, D 263® LA eco, and AS 87 eco.

 

1. Formats

1.1 Formats of down-drawn stock sheets

Formats
 Dimensions D 263® T eco 
in mm		 D 263® LA eco 
in mm		 AF 32® eco 
in mm		 AS 87 eco in mm
Thickness > 0.1 mm
510 x 430
 415 x 360
 - 500 x 400
Thickness ≤ 0.1 mm
(Ultra Thin Glass) 		    440 x 360  -  510 x 430  500 x 400 
Thickness range  min.  0.03  0.30  0.03 0.07 
Thickness range  max.  1.10  0.70  0.10  0.33 
 

 

1.2 Formats of down-drawn stock sheet D 263® M

Designation/
Type		 Length
in mm		 Tolerance 
Length in mm		 Gross width1
in mm		 Tolerance
Gross width
in mm		 Quality (Net)
width2 in mm		 Tolerance Quality
width in mm
No. 0 435  ± 10  410  ± 20  360  +0/-15 
No. 1  435 or 710  ± 10 410  ± 20  380  +0/-15
No. 1½   435 or 710 ± 10  410  ± 20  380  +0/-15 
No. 2  435 or 710  ± 10  410  ± 20  380  +0/-15 

(1) Gross width includes the bead
(2) Net width delimits the maximum useable sheet width
Other formats on request

 

1.3 Formats of down-drawn stock sheet D 263® M 1½ H

Designation/
Type1		 Length
in mm		 Tolerance
Length in mm		 Total width
in mm		 Tolerance Total
width in mm		 Quality (Net)
width2 in mm		 Tolerance Quality
width in mm
No. 1½ H 435  ± 5  420  ± 5  380  +10/-0 

(1) According to ISO 8255-1               
(2) Net width delimits the maximum useable sheet width

 

2. Geometrical properties

2.1 Geometrical properties of down-drawn stock sheets

Thickness(1)
in mm		 Thickness
Tolerance(2)in µm		 Total Thickness
Variation (2) in µm  		 Flatness(3)
in µm
D 263® T eco
0.03  ± 10 ≤ 15 ≤ 3000 
0.05  ± 10  ≤ 15  ≤ 3000 
0.07  ± 10  ≤ 15  ≤ 3000 
0.10  ± 10  ≤ 10  ≤ 1500 
0.145  ± 10  ≤ 10  ≤ 1500 
0.175  ± 10  ≤ 10  ≤ 1500 
0.21  ± 15  ≤ 15  ≤ 200 
0.25  ± 15  ≤ 15  ≤ 150 
0.30  ± 15  ≤ 15  ≤ 150 
0.40  ± 15  ≤ 15  ≤ 150 
0.50  ± 15  ≤ 15  ≤ 150 
0.55  ± 15  ≤ 15  ≤ 150 
0.70  ± 20  ≤ 20  ≤ 250 
0.90  ± 25  ≤ 25  ≤ 250 
1.00  ± 30  ≤ 25  ≤ 250 
1.10  ± 30  ≤ 25  ≤ 250 
D 263® LA eco 
0.30  ± 20 ≤ 20  ≤ 600 
0.50  ± 50  ≤ 25  ≤ 600 
0.70  ± 50  ≤ 40  ≤ 700 
AF 32® eco 
0.03  ± 15  ≤ 15  ≤ 3000 
0.05  ± 15  ≤ 15  ≤ 3000 
0.07  ± 15 ≤ 15  ≤ 3000 
0.10  ± 15  ≤ 15  ≤ 1500 
AS 87 eco 
0.07  ± 20  ≤ 20  ≤ 1000 
0.10  ± 20  ≤ 20  ≤ 800 
0.145  ± 20 ≤ 20  ≤ 800 
0.175  ± 20  ≤ 20  ≤ 800 
0.21  ± 20  ≤ 20  ≤ 500 
0.25  ± 20  ≤ 20  ≤ 500 
0.33  ± 20  ≤ 20  ≤ 500 

(1) Other thicknesses on request
(2) According to SEMI MF 1530 GBIR
(3) According to SEMI M1 GBINFER

 

2.2 Geometrical properties1 of D 263® M and D 263® M 1½

Designation/
Type		 Nominal
thickness in mm		 Thickness
tolerance in mm		 TTV2 (Total Thickness) Flatness with
beads in mm		 Flatness without
beads3 in mm
No. 0
 0.100  ± 0.015  ≤ 30  10  2.5 
No. 1  0.145  ± 0.015  ≤ 30  8  2.5 
No. 1½   0.175  ± 0.015  ≤ 30  8  2.5 
No. 1½  H  0.170  ± 0.005  ≤ 10  - 0.5 
No. 2  0.210  ± 0.020  ≤ 40  8  2.5 
 

(1) Geometrical properties are only valid on quality width         
(2) According to SEMI MF 1530 GBIR 
(3) According to SEMI M1 GBINFER

 

3. Quality properties

3.1 Quality properties of down-drawn stock sheets

Properties - General Conditions Specifications
Roughness Ra ≤ 1 nm
Cracks  visible  none 

 

Spot type defects (e.g. inclusions, bubbles, knots, particles, digs)

Conditions: inline inspection

Specifications
< 100 µm: ignore
100 µm – 200 µm: ≤ 4 pcs. 
> 200 µm: none

 

Linear defects (e.g. scratches) | L: length W: width

Specifications
L < 25 mm and W < 20 µm: ignore
L < 25 mm and W 20 µm – 50 µm: ≤ 3 pcs. 
L > 25 mm or W >50 µm: none 


Edge defects (e.g. chips, protrusions)

Specifications
< 0.2 mm: ignore
< 1.0 mm: ≤ 3 pcs. 
> 1.0 mm: none

 

Contaminations

Condition Specifications
Inspection condition: 
light source, ≤ 5 klux, 
dark environment,
duration 15s / pc.,
cleaned		 Contaminations (e.g. glove marks, conveyor belt marks, paper marks, haze, cullet's, dust etc.)
which are cleanable by a standard cleaning process at customer side will be ignored and are
permissible without any size restriction.

 

Quality assurance

Condition Specifications
AQL according to ISO 2859
  • 100% visual inspection
  • SPC for geometrical properties

 

3.2 Quality properties of D 263® M and D 263® M 1½ H

Properties - General Conditions Specifications
Roughness Ra ≤ 1 nm
Cracks visible none

 

Stripes

Condition Specifications
150 W xenon light,
distance of light source to the
projection board 1000 mm to 1200 mm		 Stripe level ≤ limit sample at a
distance of ≥ 450 mm parallel to
projection board

 

Defects (e.g. inclusions, bubbles, knots, particles, digs) 

Condition Specifications
based on average size
(length + width)/2

≤ 4 pcs. per 1000 cm²

maximum defect area: Ø ≤ 5 mm

 

Contaminations 

Condition Specifications
Inspection condition: 
light source ≤ 5 klux, 
dark environment, 
duration 15 s / pc., 
cleaned

Contaminations (e.g. glove marks, conveyor belt marks, paper marks, haze, cullets, dust etc.)
can be judged after a suitable cleaning process; cleaning recommendations or technical
assistance on cleaning can be provided upon request. Contaminations on un-cleaned
glasses will be ignored and are permissible without any size restriction.

 

 

 

 

 

Floated sheet dimensions

The following specifications are applicable to BOROFLOAT®.

 

Standard thicknesses

Thickness (mm) Tolerance (mm)
0.70 ± 0.05
1.10 ± 0.05 
1.75  ± 0.05 
2.00  ± 0.05 
2.25  ± 0.05
2.75  ± 0.10 
3.30  ± 0.20
3.80  ± 0.20
5.00  ± 0.20 
5.50  ± 0.20
6.50  ± 0.20
7.50  ± 0.30
9.00  ± 0.30 
11.00  ± 0.30 
13.00  ± 0.30 
15.00  ± 0.40 
16.00  ± 0.50 
18.00  ± 0.50 
19.00  ± 0.50 
20.00  ± 0.70 
21.00  ± 0.70 
25.40 ± 1.00 

Panel thickness is continuously measured during production using laser thickness measuring equipment.
Further thicknesses and tolerances are available on request.

 

Standard sizes of BOROFLOAT® 33

Size (mm) Thickness (mm)
1,150 x 850 0.7 - 25.4
1,700 x 1,300  16.0 - 21.0
2,300 x 1,700  0.7 - 15.0 

 

Available materials

SCHOTT Sheets are available in the following materials:

  • D 263®
  • BOROFLOAT® 
  • AS 87 eco
  • B 270®

To find out more, please see the related products on the overview page.

Want to know more? Let’s talk

Whether you need more information, samples, a quote, or advice for a project, we would be delighted to talk to you.

Contact us
Man in glasses in business office on phone while working on laptop_605x350.jpg