KJ GROUP Target Head for Magnetron Sputtering Systems

Overview

The KJ GROUP Target Head is a precision-engineered component designed for DC and RF magnetron sputtering deposition systems. It operates on the principle of magnetically confined plasma generation—where a permanent ring-shaped magnet array mounted directly on the target surface creates a closed-loop magnetic field parallel to the target plane. This configuration enhances electron confinement near the target surface, increasing ionization efficiency and sustaining high-density plasma at lower operating pressures (typically 0.1–5 mTorr). As a result, the target head enables higher sputter rates, improved film uniformity across substrates up to 6 inches in diameter, and stable long-term operation under continuous duty cycles. Its modular mechanical interface supports standard flange connections (CF35/CF63), allowing seamless integration into both benchtop and industrial-scale vacuum coating platforms.

Key Features

• Integrated annular permanent magnet assembly with optimized NdFeB grade magnets, delivering consistent magnetic field strength (>800 Gauss at target surface) and thermal stability up to 120 °C
• Universal compatibility with metallic, insulating, ferromagnetic, and non-magnetic sputtering targets—including Al, Ti, Cu, SiO₂, ITO, and Co–Fe alloys
• Multiple mechanical configurations available: linear (straight) cathode, bent-angle cathode, rectangular planar target holder, rotating (rotating-cathode) design, co-rotating/self-rotating dual-axis variants, and multi-arc cathodic arc source adaptation
• Water-cooled copper backing plate with standardized 3/8″ NPT or M12×1.5 coolant port for efficient heat dissipation during high-power operation (up to 5 kW DC or 3 kW RF)
• Machined from oxygen-free high-conductivity (OFHC) copper with optional stainless-steel or aluminum alloy housing for UHV-compatible applications (≤1×10⁻⁹ mbar base pressure)

Sample Compatibility & Compliance

The Target Head accommodates target diameters from 2″ to 8″ (50–200 mm) and thicknesses ranging from 3 mm to 12 mm, supporting bonded and monolithic target configurations. It complies with ISO 14001 environmental handling standards for vacuum component manufacturing and conforms to SEMI F20-0202 specifications for semiconductor-grade sputtering hardware interfaces. When integrated into fully validated coating systems, it supports GLP- and GMP-aligned process documentation workflows, including traceable calibration records for magnetic field mapping and thermal performance validation. No proprietary consumables or firmware locks are implemented—ensuring full third-party serviceability and alignment with FDA 21 CFR Part 11 requirements for electronic record integrity where paired with compliant control software.

Software & Data Management

While the Target Head itself is a passive hardware module, its operational parameters—including applied power, chamber pressure, cooling flow rate, and substrate bias—are monitored and logged via host system controllers (e.g., MKS Instruments Flow Controllers, INFICON Vacuum Gauges, or custom LabVIEW-based DAQ environments). KJ GROUP provides detailed mechanical drawings (STEP/IGES), magnetic field simulation reports (ANSYS Maxwell output), and installation torque specifications to facilitate integration into automated data acquisition pipelines. All documentation adheres to ISO/IEC 17025 traceability guidelines for metrological support, enabling audit-ready process qualification in regulated environments such as medical device thin-film manufacturing or aerospace optical coating facilities.

Applications

• Research-scale thin-film development: transparent conductive oxides (TCOs), ferroelectric perovskites (e.g., PZT), and transition metal dichalcogenides (TMDs)
• Industrial production of anti-reflective, low-emissivity (Low-E), and electrochromic coatings on architectural glass
• Semiconductor backend metallization (Al/Cu interconnects), MEMS packaging barriers (TiN/Ta), and magnetic tunnel junction (MTJ) stack deposition
• Optical filter fabrication requiring sub-nanometer thickness control and <±1.5% run-to-run film thickness repeatability
• Functional coating of biomedical implants (hydroxyapatite, Ag-doped TiO₂) under cleanroom-certified Class 1000 conditions

FAQ

Is this target head compatible with RF impedance matching networks?
Yes—mechanical and electrical grounding provisions meet IEEE Std. 1394-2008 requirements for RF sputtering; users must verify matching network voltage standing wave ratio (VSWR) remains ≤1.5:1 at operating frequency (typically 13.56 MHz or 2 MHz).

Can it be used for reactive sputtering of nitrides or oxides?
Yes—compatible with gas injection manifolds for N₂, O₂, or CH₄; recommended for use with mass flow controllers meeting SEMI E10-0201 accuracy class.

What is the maximum allowable target erosion depth before reconditioning?
For optimal plasma stability, replace or re-machine targets when erosion exceeds 30% of original thickness—verified via profilometry or eddy-current thickness mapping.

Does KJ GROUP provide magnetic field mapping data for custom target geometries?
Yes—upon request, finite-element simulated B-field contour plots (XY/Z-plane slices) are supplied for customer-specific target shapes and magnet grades.

Are spare magnet assemblies available for field replacement?
Yes—ring magnet sets (including temperature-compensated variants) are stocked and shipped with demagnetization test certificates per IEC 60404-8-1.