Aolong ALW-XYDZ 700A Closed-Shield X-ray Crystal Orientation Instrument for Sapphire Ingot (X/Y-Axis Dual-Stage)

Overview

The Aolong ALW-XYDZ 700A is a precision-engineered, fully shielded X-ray crystal orientation instrument designed specifically for high-accuracy angular alignment of sapphire ingots in semiconductor and optical substrate manufacturing. It operates on the Bragg diffraction principle, utilizing monochromatic Cu-Kα radiation (λ = 1.5418 Å) to determine lattice plane orientations relative to the physical geometry of cylindrical sapphire crystals. Unlike conventional single-axis diffractometers, the ALW-XYDZ 700A integrates two independent, mechanically isolated goniometric stages—left-stage for X-axis (radial) orientation and right-stage for Y-axis (end-face) angular verification—enabling sequential, traceable alignment of both crystallographic axes within a single instrument enclosure. This dual-stage architecture eliminates manual repositioning errors and supports batch processing of multiple 2–6 inch diameter sapphire rods (minimum length: 20 mm), directly on a movable flitch plate. The system complies with IEC 61000-6-3 (EMC) and IEC 61000-6-4, and its fully interlocked shielding meets national radiation safety standards for Class II X-ray equipment (GBZ 138–2002).

Key Features

• Fully enclosed, lead-shielded cabinet with automatic main shutter and door interlock circuitry—ensures operator safety and regulatory compliance during continuous operation.
• Dual independent goniometric stages: left-stage optimized for radial (X-axis) orientation via translational rail-guided flitch mounting; right-stage equipped with precision angle-adjustable fixture for end-face (Y-axis) measurement and reference-plane verification.
• High-resolution angular readout: digital display in both degree-minute-second (DMS) and decimal-degree formats, with programmable target angle and real-time deviation (delta) calculation—minimum resolution 1″ (0.000278°) in DMS mode; 0.001° in decimal mode.
• Configurable X-ray detection: selectable Geiger–Müller counter (DC ≤1000 V) or NaI(Tl) scintillation detector (DC ≤1200 V), each calibrated against certified quartz standard for reproducible peak identification.
• Adjustable time constant (Fast/Slow) for signal integration—optimized for low-intensity diffraction peaks from weakly scattering sapphire (0006) or (101̅4) reflections.
• Robust mechanical architecture: stainless-steel base frame, hardened aluminum stage plates, and backlash-free micrometer-driven angular positioning—engineered for long-term stability under factory floor conditions.

Sample Compatibility & Compliance

The ALW-XYDZ 700A accommodates cylindrical sapphire ingots ranging from 2 to 6 inches in diameter and minimum lengths of 20 mm. Its modular flitch plate design allows simultaneous alignment of up to eight 4-inch rods per batch, significantly reducing throughput time in crystal preparation workflows. The instrument is validated for use with common sapphire orientations including C-plane (0001), A-plane (112̅0), and R-plane (101̅2), with angular repeatability verified per ASTM F1727–21 (Standard Practice for X-ray Diffraction Measurement of Sapphire Orientation). Radiation shielding performance conforms to GBZ 138–2002 and exceeds requirements for ISO 20816-1:2016 (vibration severity assessment for stationary lab equipment). All electrical subsystems comply with CE marking directives (2014/30/EU EMC Directive and 2014/35/EU LVD Directive).

Software & Data Management

While the ALW-XYDZ 700A operates as a standalone hardware platform with embedded digital control logic, it supports external data logging via RS-232 serial interface (standard) or optional USB-to-serial adapter. Angular readings—including absolute position, deviation from preset, and integrated count rate—are timestamped and exportable in CSV format for downstream traceability. The system’s firmware implements audit-ready parameter logging: tube voltage/current settings, shutter state, detector selection, and time-constant mode are recorded with each measurement cycle. For laboratories operating under GLP or GMP frameworks, the instrument’s deterministic angular output and stable mechanical calibration support full 21 CFR Part 11 compliance when paired with validated third-party acquisition software that enforces electronic signatures and change control.

Applications

• Precision orientation of sapphire boules prior to slicing—ensuring minimal off-cut angle deviation for LED substrate wafers.
• Quality assurance of crystallographic alignment in RF filter substrate production (e.g., for 5G SAW/BAW devices).
• Reference-plane metrology for optical window blanks used in aerospace-grade laser systems.
• In-process verification of Y-axis tilt during wafer lapping—reducing post-grinding misorientation rework.
• Calibration transfer between master reference crystals and production-grade sapphire ingots in ISO/IEC 17025-accredited labs.

FAQ

What crystallographic planes can be measured with the ALW-XYDZ 700A?
The instrument is optimized for primary sapphire reflections including (0006), (101̅4), and (112̅0), corresponding to C-, R-, and A-plane orientations. Custom angular ranges may be configured for non-standard reflections upon request.
Is the system compatible with automated material handling systems?
Yes—the flitch plate interface includes standardized M6 threaded mounting holes and a datum edge for repeatable robotic arm integration. Optional pneumatic clamping kits are available for inline production environments.
How often does the instrument require recalibration?
Under normal usage (≤4 hrs/day), annual verification using NIST-traceable quartz reference is recommended. Mechanical zero-point checks should be performed weekly using the built-in collimator alignment routine.
Can the ALW-XYDZ 700A measure non-sapphire crystals?
It is calibrated and validated for sapphire. For other hexagonal crystals (e.g., SiC, ZnO), users must supply reference standards and perform empirical sensitivity mapping—support documentation and service calibration are available upon contract.
What safety certifications does the instrument hold?
It carries CCC certification (China Compulsory Certification) and meets IEC 61010-1:2010 for laboratory electrical safety. Radiation leakage is <0.5 µSv/h at 5 cm from any surface—well below the 2.5 µSv/h limit specified in GBZ 138–2002.