Custom Quartz Plates & Sheets

Flat quartz stock cut to size, thickness, and edge condition — the base plate product this category builds on.

Plate size, thickness, and flatness aren't independent — a thin plate at a large L×W holds flatness less easily than the same flatness spec on a thicker or smaller piece. Confirm all three together, not flatness alone.

Available Shapes, Sizes and Surface Options

Standard plate is rectangular and as-cut. Ground surface (flat, matte finish, tighter thickness control) and polished surface (optical-quality finish) are available where the application needs more than a cut edge and rough face. Round and custom-profile plates are available too — for round stock specifically, see our Quartz Discs line.

Edge, Surface and Hole Finishing Options

Edges are as-cut as standard; ground or chamfered edges are available where a sharp edge would chip in handling or needs to seat against another part. Holes — for mounting or fixturing — are added by mechanical or diamond drilling down to about Ø0.8 mm at ±0.02 mm, or by laser for finer openings; tell us hole diameter and position and we'll confirm which process applies. Before shipment we check L×W×thickness, flatness, parallelism, edge condition, surface defects, and hole position.

2000 ×2000 ×40 mmRough Plate

1900 ×1800 ×40 mmPolished Plate

3Surface-Quality Levels

1 or 2Polished Faces

JGS1 / 2 / 3Material Options

Custom CutSquare, Rectangular or Profiled

Define the Finished Plate

Size Alone Does Not Define a Quartz Plate

Controlled Feature	Reference Capability / Drawing Requirement
Flatness	Specified over the functional area rather than applied as one value to every plate size
Parallelism	Defined between the two finished faces where spacing or optical alignment depends on it
Surface Finish	As-cut / ground / single-side polished / double-side polished
Surface Quality	80/50 functional / 60/40 precision / 40/20 optical reference levels
Edge Geometry	As-cut / ground edge / safety chamfer / bevel / radius / notch

Finish Selection

Match the Surface to the Plate Function

Plate Level	Face & Edge Condition	Use When
Cut or Ground Stock	As-cut or ground faces; ground safety edges	Furnace liners, supports, heat shields and machining blanks
Functional Polished	One or two polished faces; 80/50 reference surface quality	Sight plates, protective covers and general transmission paths
Precision Flat Plate	60/40 reference surface quality with flatness and parallelism on the drawing	Coating substrates, fixtures and alignment-sensitive equipment
Optical Plate	40/20 reference surface quality; optical flatness specified separately	Windows, beam paths and precision optical processing

Delivery Forms

Plate Conditions That Change Cost and Lead Time

Cut SheetEconomical flat stock with machining allowance for downstream work

Ground PlateControlled thickness and safer edges for thermal or structural service

Polished PlateSingle- or double-side polished for transmission, coating or clean surfaces

Profiled BlankCustom outline, holes or notches supplied for the finished assembly drawing

Applications

Where Plate Finish Changes the Function

Sight & Protective PlatesTransparent barriers and observation surfaces for thermal or chemical equipment

Coating & Optical SubstratesPolished flat stock prepared around surface quality, flatness and edge requirements

Furnace & Heating PlatformsGround or cut quartz plates used as liners, supports and heat-resistant working surfaces

Semiconductor EquipmentLow-contamination flat parts and starting blanks for holders, covers and process fixtures

Product Examples

Product Forms and Finished Components

Need a quartz plate specified as a finished part?Send length, width, thickness, functional area, flatness, parallelism, surface and edge requirements.

Open the Plate Configurator

Engineering Data

Grade-Qualified Material Purity

Electric-fused / flame-fused quartz: SiO₂ ≥99.99%; synthetic JGS1-grade fused silica: ≥99.999%. Grade and lot certificate govern supplied material.

Engineering Data

Large-Format Manufacturing Lines

Form	Dimensional envelope
Rough plate series	Up to L2000 × W2000 × T40 mm
Polished plate	L10 × W10 × T>0.8 mm to L1900 × W1800 × T40 mm

Size limits describe separate blank and finishing routes, not simultaneous limits for every material grade. Grinding allowance, optical aperture and finished tolerances are agreed by order.