CASE STUDY · Semiconductor and Microelectronics Glass

Semiconductor Industry Processing Case Study

For carriers, lids, wafers and micro-hole glass in semiconductor, MEMS and microelectronics projects, we plan material, precision processing and clean delivery as one workflow.

Semiconductor industry processing workshop

Semiconductor industry inspection and delivery

Project Overview

The complete route from material confirmation to finished-part delivery

Semiconductor-related glass parts often focus on thermal expansion, thickness uniformity, micro-holes or hole arrays, two-sided condition and cleanliness. Material selection must match downstream processes such as lithography, bonding, coating, packaging or inspection.

Typical components: Glass wafers, carriers, lids, micro-hole arrays, packaging windows
Main operations: Precision cutting, drilling, lapping and polishing, cleaning, inspection
Control focus: CTE, TTV, hole positions, surface, particles and traceability
Applications: MEMS, sensors, microelectronics and semiconductor equipment

Discuss a Similar Project

ENGINEERING GUIDE

Confirm the process first, then the glass

A glass wafer of the same size has different requirements as a carrier, an anodic bonding lid, a lithography substrate, a micro-hole interposer or an equipment window. Material name, process temperature, geometric specification, surface and packaging must be confirmed together.

Applications

Where it can be used

Glass lids and anodic bonding wafers for MEMS and sensors
Semiconductor process carriers, temporary carriers and thin-plate supports
Wafer-level packaging windows, spacers and transparent caps
Micro-hole/hole-array glass and via substrates for customer metallization
Viewing windows, insulating plates and optical components in semiconductor equipment

Material Selection Logic

Why glass

Glass combines transparency, electrical insulation, chemical stability and adjustable thermal expansion. Low-alkali glass reduces the risk of alkali metal migration; borosilicate glass suits glass-silicon thermal matching and anodic bonding; fused silica suits low-CTE, high-temperature, high-purity and specific spectral environments.

Material Selection

Common materials and their applications

Material	Applications	Selection focus
PYREX® Micro-Electro	MEMS, anodic bonding and wafer-level packaging	CTE 3.43 × 10⁻⁶/°C（0–300°C）
BOROFLOAT® 33	General wafers, sensing, microfluidics and equipment windows	CTE 3.25 × 10⁻⁶ K⁻¹, heat and chemical resistant
EAGLE XG® / alkali-free glass	Substrates for TFT, thin films, microelectronics and low-ion applications	Watch the alkali content, strain point and pristine surface
Fused Silica	High-temperature, high-purity, low-CTE, UV/laser and equipment components	Confirm the hydroxyl, impurities and spectral grade

Typical Parameters

Common enquiry parameters

Item	Common starting points or wording	Engineering notes
Wafer diameter	Commonly 100, 150, 200, 300 mm	Compatible with equipment, cassettes, chucks and layout
Thickness	Commonly 0.20-1.10 mm; carriers may also be thicker	Affects stiffness, thermal mass and the equipment focal plane
TTV	Standard discussion from ≤10-25 μm; high-precision bonding can be evaluated to ≤1-5 μm	Determines the bonding gap, focal plane and local stress
Bow/Warp	Defined individually by equipment and process	State the measurement method and edge exclusion
Surface roughness	Bonding/thin-film faces usually require nm-level control	Values must be given with the measurement bandwidth
Micro-holes	Inlet/outlet hole diameter, taper, pitch, position tolerance and hole-to-edge distance	Hole walls and the heat-affected zone affect downstream metallization and sealing
Cleanliness	Particles, ions, metals and organic residue	Commit only to grades for which inspection and control capability actually exists

Structure and Function

What it usually needs to look like

Available as standard wafers, square or rectangular carriers, discs with Flat/Notch, glass lid wafers, micro-hole arrays, package plates with windows/cavities, thin Spacers and equipment viewing windows.

Provide a stable carrier for lithography, thin films, bonding and packaging
As transparent lids, electrically insulating layers and dielectric structures
Carry micro-hole arrays and the customer's subsequent interconnect structures
Provide equipment-compatible dimensions, edges and locating references

Performance Requirements

Performance items recommended for confirmation

Material thermal expansion, strain point, alkali content and dielectric matching
Low TTV, controlled Bow/Warp and stable thickness
Low roughness, low particles and low residue on the functional face
Micro-hole position, taper, hole walls and heat-affected zone are controlled
Material lot, process lot, inspection and packaging traceability

Preparing Your Enquiry

Please provide in the drawing or enquiry

Process application, maximum temperature and atmosphere, silicon/film/adhesive materials, size and thickness, TTV, Bow/Warp, surface and roughness, micro-hole drawing, edge exclusion, particle/ion/metal limits, inspection method, quantity, lot and packaging. Where only glass micro-holes are supplied, it is not promoted as a complete TGV solution including metallization and reliability validation.

The parameters above are for preliminary material and process selection and do not constitute a uniform guarantee for all dimensions, thicknesses and materials. Final specifications, measurement methods and delivery standards are governed by the drawing, samples and order documents confirmed by both parties.

Downstream process confirmation

Understand the bonding, lithography, coating, packaging or equipment assembly conditions first, and define the material and cleanliness boundaries.

Semiconductor industry processing and material preparation

Semiconductor industry processing inspection

Material and geometry planning

Select the material and process route from thermal expansion, thickness, dimensions, hole geometry and surface requirements.

Precision processing and in-process protection

Complete cutting, hole arrays, edge or double-sided processing, controlling particles and scratches during handling.

Inspection and clean delivery

Check dimensions, hole positions, edges and surface condition, and complete cleaning, separated packaging and batch delivery.

Start material selection and processing requirements from the same drawing

Send the drawing and key acceptance items and we will assess the project together with the material and process route.

Email Your Drawings Contact the Engineering Team