ADT 7234 Precision Dicing Saw

Overview

The ADT 7234 Precision Dicing Saw is an industrial-grade semiconductor dicing system engineered for high-accuracy, high-reproducibility separation of silicon wafers, compound semiconductor substrates (e.g., GaAs, SiC, GaN), and advanced packaging substrates. It operates on the principle of precision mechanical scribing and full-cut dicing using diamond-impregnated abrasive blades rotated at ultra-high speeds via an air-bearing spindle. The system leverages hydrodynamic air film support to eliminate mechanical contact, enabling nanometer-level runout control and thermal stability critical for sub-10 µm kerf width and minimal chipping in brittle materials. Designed for front-end and back-end semiconductor manufacturing environments, the 7234 supports both standard wafer-level dicing and complex heterogeneous integration workflows—including thin-wafer handling (<50 µm), tape-mounted die singulation, and multi-layer substrate segmentation.

Key Features

• Air-bearing spindle with brushless DC motor, rated for continuous operation at 30,000 rpm (2.5 kW output), delivering <0.3 µm radial runout and exceptional rotational stability.
• Full-coverage motion architecture: X-axis (translation) driven by ball-screw + brushless DC motor (max. 600 mm/sec); Y-axis (indexing) with ball-screw + stepper motor and linear encoder (0.1 µm resolution, ±3 µm cumulative error over ∅300 mm).
• Z-axis (cut depth control) features ball-screw + brushless DC motor with 0.2 µm resolution and ±1.0 µm repeatability; θ-axis employs closed-loop direct-drive brushless motor (4 arc-second resolution, 350° travel).
• Integrated high-magnification vision system: digital CMOS camera with dual LED illumination (coaxial and oblique), continuous digital zoom (70×–280× standard; optional 50×–200× configuration), and real-time edge detection algorithms for automatic alignment and saw path correction.
• On-board cleaning station with programmable rinse-dry cycles: dual-fluid (air + DI water) nozzle array, variable-speed spin (100–2,000 RPM), and vacuum-assisted drying—compliant with ISO Class 5 cleanroom requirements when integrated into fab toolsets.
• Modular wafer handling: slot-to-slot cassette interface with integrity verification; optional drawer-type load port for automated material transfer compatibility.

Sample Compatibility & Compliance

The ADT 7234 accommodates round wafers up to ∅300 mm and rectangular substrates up to 253 mm × 243 mm. It supports blade diameters from 4″ to 5″ (101.6–127 mm), compatible with standard diamond, resin-bond, and metal-bond dicing blades used in silicon, SiC, GaN, glass, and ceramic processing. The system meets SEMI S2-0201 safety guidelines and incorporates ESD-safe grounding paths (optional ESD kit available). All motion control firmware and recipe management comply with SEMI E30 (GEM) and E40 (SECS-II) communication standards. Optional UV-curing module enables inline adhesive curing post-dicing for temporary bonding applications. System design aligns with ISO 9001:2015 manufacturing quality protocols and supports GLP/GMP audit trails when paired with validated software configurations.

Software & Data Management

The ADT 7234 runs on the New User Interface (NUI) platform—a 17″ capacitive touchscreen HMI with multi-language support (English, Japanese, Korean, Simplified Chinese) and intuitive workflow navigation. Recipes include blade-specific parameters (spindle speed, feed rate, cut depth, step-and-repeat pattern), vision calibration profiles, and cleaning cycle definitions. All operational data—including spindle current, Z-axis position logs, vision alignment offsets, and alarm history—are timestamped and stored locally with optional network export via Ethernet/IP or OPC UA. Audit trail functionality records user login/logout events, parameter modifications, and job execution timestamps—supporting FDA 21 CFR Part 11 compliance when deployed with electronic signature modules and role-based access control.

Applications

• Front-end wafer dicing: silicon, SOI, SiC, GaN, and sapphire substrates for power devices, RF components, and MEMS sensors.
• Advanced packaging: fan-out wafer-level packaging (FOWLP), panel-level packaging (PLP), and interposer dicing with tight tolerance control on copper redistribution layers.
• MicroLED and display substrate segmentation: precise separation of RGB sub-pixels on glass or sapphire carriers without micro-crack propagation.
• Research & development: low-volume prototyping of novel heterostructures, thin-film photovoltaics, and bio-MEMS devices requiring non-thermal, low-damage cutting.
• Back-grinding support: pre-dicing alignment prior to thinning, and post-thinning dicing of ultra-thin wafers mounted on UV-curable tapes.

FAQ

What wafer sizes does the ADT 7234 support?
The system handles circular wafers up to ∅300 mm and rectangular substrates measuring up to 253 mm × 243 mm.
Is the spindle air-bearing design compatible with high-precision thin-wafer dicing?
Yes—the air-bearing spindle delivers sub-micron runout and minimal vibration, essential for maintaining edge quality on wafers as thin as 25 µm when used with appropriate blade selection and coolant flow optimization.
Does the system support automated integration into a smart factory environment?
Yes—SECS/GEM host communication, OPC UA data export, and Ethernet/IP connectivity enable seamless integration with MES, AMHS, and factory automation systems.
Can the vision system detect alignment marks on low-contrast or transparent substrates?
The dual-mode LED illumination (coaxial + oblique) combined with adaptive histogram equalization and sub-pixel edge interpolation allows reliable mark detection on silicon nitride films, quartz, and polymer-coated wafers.
What utility requirements must be met for installation?
Electrical: 200–240 VAC, 50/60 Hz, single-phase, 16 A circuit. Pneumatic: 5.5 bar N₂ supply at ≥700 L/min; compressed air ≥500 L/min; process gas (N₂) ≥200 L/min. Cooling: DI water flow ≥7 L/min at ≤25°C inlet temperature; spindle cooling water ≥1.1 L/min.