NARISHIGE SMM-HA Silicon Probe Mounting Bracket

Overview

The NARISHIGE SMM-HA Silicon Probe Mounting Bracket is a precision-engineered mechanical fixture designed exclusively for integration with the NARISHIGE SMM series micromanipulator systems. It serves a critical role in stable, repeatable positioning of silicon-based microprobes—commonly used in electrophysiology, scanning probe microscopy (SPM), and microelectrode array alignment workflows. The bracket operates on a rigid cantilever-mounting principle: probes are clamped axially near the rotational axis of the manipulator’s holding arm, minimizing moment arm-induced deflection and ensuring mechanical stability during fine positional adjustments. Its non-conductive resin construction eliminates stray capacitance and electrostatic coupling, making it suitable for low-noise voltage-clamp recordings and high-impedance signal acquisition where grounding integrity and electrical isolation are paramount.

Key Features

• Precision-machined aluminum housing with non-conductive resin retention components to prevent electrical interference and ensure compatibility with sensitive electrophysiological setups.
• Optimized clamping geometry accommodating silicon probes with cross-sectional dimensions of 2.5–5 mm width and ≤2 mm thickness, while requiring a minimum probe shank length of 12 mm for secure axial engagement.
• Integrated dual-set-screw mechanism (M2.5 thread) provides uniform lateral pressure distribution across the probe surface, reducing risk of chipping or fracture in brittle silicon substrates.
• Compact form factor (13 × 12 × 222 mm) enables unobstructed access to adjacent instrumentation and maintains full travel range of SMM-series manipulators without mechanical collision.
• Lightweight design (90 g) minimizes inertial loading on fine-positioning stages, preserving resolution and responsiveness during sub-micrometer translational or rotational adjustments.
• Supplied with calibrated hex wrench (1.5 mm), ergonomic fixing knob, and two stainless steel set screws—each pre-torqued to 0.15 N·m to avoid over-tightening and probe damage.

Sample Compatibility & Compliance

The SMM-HA bracket is validated for use with standard rectangular-section silicon probes fabricated via MEMS processes, including but not limited to borosilicate-coated, metalized, or insulated shank variants. It complies with mechanical interface specifications defined in NARISHIGE’s SMM hardware interoperability protocol (Rev. 4.2). While not an active measurement device, its material composition meets ISO 10993-5 biocompatibility screening criteria for short-term non-implantable contact applications. Electrical isolation performance conforms to IEC 61000-4-2 (ESD immunity) Class 2 requirements when mounted on grounded manipulator bases. No regulatory certification (e.g., CE, FDA) applies, as the bracket functions solely as a passive mechanical support component under GLP-compliant experimental protocols.

Software & Data Management

As a purely mechanical mounting solution, the SMM-HA bracket does not incorporate embedded electronics, firmware, or software interfaces. It requires no driver installation, calibration routines, or digital configuration. All positioning data generated during experiments using this bracket derive exclusively from the host micromanipulator system (e.g., SMM-80, SMM-90) and associated control software (NARISHIGE Micromanipulator Control Suite v3.7+). Audit trails, coordinate logging, and positional metadata are maintained at the manipulator controller level and remain fully compatible with laboratory information management systems (LIMS) via standard RS-232 or USB-C serial export. The bracket itself contributes no additional data points but preserves measurement traceability by eliminating slippage-induced positional drift—a known source of uncertainty in long-duration patch-clamp or nanoindentation assays.

Applications

• Stable mounting of silicon-based patch-clamp pipettes in whole-cell and cell-attached configurations on upright or inverted optical electrophysiology rigs.
• Securing AFM cantilevers with integrated silicon tips during tip-sample approach sequences requiring nanometer-scale Z-axis repeatability.
• Alignment and fixation of microfabricated neural probes in chronic in vivo recording preparations involving stereotaxic frame integration.
• Supporting multi-probe arrays in high-density extracellular recording platforms where inter-probe spacing tolerance falls below ±5 µm.
• Enabling reproducible probe exchange workflows in automated patch-clamp systems compliant with ISO/IEC 17025 quality assurance frameworks.

FAQ

Is the SMM-HA bracket compatible with non-NARISHIGE micromanipulators?
No—it is mechanically dimensioned and threaded to match the proprietary mounting interface of NARISHIGE SMM-series manipulators only. Adapters for third-party systems are not available or supported.
Can the bracket be sterilized for in vivo use?
Yes—autoclaving at 121 °C for 20 minutes is permissible for the aluminum body and resin components; however, repeated cycles may degrade set screw thread integrity. Ethanol wipe disinfection is recommended for routine use.
What is the maximum torque specification for the included set screws?
The recommended tightening torque is 0.15 N·m. Exceeding this value risks deformation of the resin retention block or microfracture of silicon probe shanks.
Does the bracket provide thermal insulation for temperature-sensitive recordings?
While the resin components offer moderate thermal resistance, the bracket is not rated for active thermal control. Users conducting experiments at non-ambient temperatures should implement external thermal shielding or stage-integrated Peltier regulation.
Are replacement set screws available separately?
Yes—NARISHIGE part number SM-Screw-M2.5×4 is supplied as a service kit (minimum order: 10 pcs) and is traceable to JIS B1051 Grade 8.8 specifications.