Gel-Pak MB Series Reusable Membrane Carrier Boxes

Overview

The Gel-Pak^® MB Series Membrane Carrier Boxes are precision-engineered handling and transport solutions designed specifically for fragile, high-value semiconductor components, optoelectronic devices, and irregularly shaped precision parts—including test sockets, prisms, lenses, crystals, and 3D micro-assemblies. Unlike conventional foam or tray-based carriers, the MB Series employs a non-adhesive, tension-based immobilization principle: two ultra-thin, highly elastic polyether polyurethane membranes—mounted on rigid, optically transparent POLYREX^® PG-33 polystyrene housings—conform dynamically to the geometry of the device upon lid closure. This creates a passive, zero-contact clamping force derived solely from membrane elasticity and surface contour matching—not chemical adhesion or vacuum. The result is secure mechanical retention without residue, particle generation, or surface stress—critical for post-packaging metrology, cleanroom-compatible logistics, and wafer-level optical inspection.

Key Features

• Non-Adhesive Immobilization: Eliminates risk of gel residue, outgassing, or surface contamination common with traditional hydrogel carriers—ensuring compatibility with photolithography, bonding, and metrology workflows.
• High-Optical Transparency: POLYREX^® PG-33 housing and polyurethane membranes provide >92% visible-light transmission, enabling in-situ visual inspection, automated optical alignment verification, and post-closure defect screening without unpacking.
• ESD-Controlled Variants: MB-SD models incorporate static-dissipative polystyrene (surface resistivity 10⁵–10⁹ Ω/sq), certified per ANSI/ESD S20.20, for safe handling of gate-sensitive ICs and MEMS devices.
• Modular Dimensional Scalability: Over 25 standard configurations—from compact MB-38T-16 (38 × 38 × 16 mm) to large-format MB-300T-50 (300 × 300 × 50 mm)—supporting single-die, multi-die, and full-substrate transport requirements.
• Reusable & Cleanroom-Compatible: Membranes withstand repeated sterilization (isopropanol wipe, nitrogen purge) and retain elasticity after ≥500 open/close cycles; housings meet ISO Class 5 (Class 100) particulate limits when processed per SEMI F21 guidelines.
• Application-Specific Frames: Jewelry-grade black/white frames (MB-J series) enhance contrast for optical component QA; blue/black clip variants (MB-T-30B/MB-T-30) simplify manual handling in production environments.

Sample Compatibility & Compliance

The MB Series accommodates devices with complex topographies—including convex optics, stepped substrates, solder-bumped wafers, and heterogeneous 3D packages—where conventional vacuum chucks or adhesive tapes induce deformation or delamination. Its passive retention mechanism avoids localized pressure points, making it suitable for low-k dielectric layers, fragile III-V epitaxial structures, and thin-film photonic crystals. All transparent variants comply with ASTM D1003 for haze and luminous transmittance. Static-dissipative models are tested per IEC 61340-5-1 and support FDA 21 CFR Part 11–aligned electronic batch records when integrated with traceable handling SOPs. No regulatory filing is required as the MB Series is classified as a Class I non-invasive packaging auxiliary under ISO 13485 and SEMI E10.

Software & Data Management

While the MB Series is a passive mechanical system with no embedded electronics, its design enables seamless integration into digital manufacturing ecosystems. Each box model carries a laser-etched alphanumeric ID (e.g., “MB-100x75T-30-0234”) compatible with barcode/QR scanning for lot traceability. When used with automated optical inspection (AOI) platforms or coordinate measuring machines (CMM), the optical clarity permits fiducial-based registration without repositioning—reducing setup time by up to 40% versus opaque carriers. Gel-Pak provides dimensional CAD models (STEP/IGES) and tolerance specifications (±0.15 mm linear, ±0.1° angular) for integration into MES and PLM systems. Full compliance documentation—including material certifications (UL 94 HB, RoHS 3, REACH SVHC), ESD test reports, and optical performance data—is available via Gel-Pak’s secure customer portal.

Applications

• Transport and storage of bare dies, flip-chip assemblies, and fan-out wafer-level packages (FOWLP)
• Safe handling of AR/HR-coated optics, micro-lenses, and diffractive optical elements (DOEs)
• Carrier for 2D material transfer processes using Gel-Pak’s complementary PDMS-based Gel-Film products
• Temporary fixturing during laser trimming, probe testing, and dicing saw alignment
• Reflow simulation carriers for thermal stress evaluation of heterogeneous integration stacks
• Qualification-grade packaging for JEDEC J-STD-033 moisture sensitivity level (MSL) Level 1–3 devices

FAQ

Can the MB Series be used in Class 10 cleanrooms?
Yes—when cleaned per SEMI F21 protocols (IPA rinse, filtered N₂ dry), MB boxes generate <1 particle ≥0.5 µm per cubic foot during handling, meeting ISO 14644-1 Class 5 requirements.
What is the maximum operating temperature for long-term storage?
Continuous use up to 60°C; short-term exposure (≤2 hrs) up to 85°C. Avoid UV exposure beyond 24 hrs to prevent polyurethane hysteresis drift.
Are custom sizes or membrane hardness levels available?
Yes—Gel-Pak offers OEM engineering support for non-standard dimensions and Shore A 30–70 membrane formulations under NDA.
How does MB compare to vacuum-based carriers for high-aspect-ratio devices?
Vacuum carriers risk suction-induced warpage in thin (<100 µm) silicon or glass substrates; MB’s distributed elastic contact eliminates this risk while maintaining positional repeatability within ±2.5 µm.
Is calibration required before use?
No—MB boxes are mechanical passive devices with no drift-prone sensors or actuators. Verification of membrane integrity and housing flatness is recommended per internal QA checklist (provided with shipment).