Diamond Lapping Film

Overview

Diamond Lapping Film is a precision-coated abrasive film that uses micron-graded diamond particles bonded onto a high-strength polyester backing. It delivers superior cutting power, excellent surface finish, and consistent performance for a wide range of polishing and lapping applications.

Specifications

Material: Micron-graded synthetic diamond abrasive
Backing: High-strength PET film
Adhesive Option: With or without PSA (Pressure-Sensitive Adhesive)
Available Grit Sizes: 0.1μm, 0.3μm, 0.5μm, 1μm, 3μm, 6μm, 9μm, 15μm, 30μm, 45μm, 60μm, 80μm
Thickness: 75μm (±5%) standard; custom thickness available
Sizes: Sheet, disc, roll, and custom die-cut shapes
Color: Varies by grit for easy identification
Format: Plain or with PSA (Pressure-Sensitive Adhesive)

Applications

Diamond Lapping Film is widely used in industries requiring ultra-precise polishing and finishing:

Fiber Optic Connectors (MPO, MTP, LC, SC, MT, etc.)
Ceramics and Sapphire Wafer Polishing
Glass and Quartz Surface Finishing
Metal and Hard Alloy Polishing (Tungsten carbide, Titanium)
Semiconductor Device Cross-Section Analysis
Electronic Component Surface Processing

Polishing Process

A typical polishing workflow using Diamond Lapping Film involves:

Coarse Polishing: Start with larger grits (e.g., 30μm or 15μm) to remove scratches, epoxy, or excess material.
Intermediate Polishing: Use mid-range grits (6μm, 3μm) to refine the surface.
Final Polishing: Apply fine grits (1μm, 0.5μm, 0.1μm) for ultra-smooth finish with minimal scratches.
Inspection: Use a microscope or interferometer to check for surface flatness, edge retention, and scratch levels.

Polishing Issues & Troubleshooting

Issue	Possible Cause	Solution
Surface Scratches	Grit too coarse or contaminated film	Switch to finer grit; ensure clean surface
Poor Edge Retention	Inconsistent pressure or film wear	Maintain uniform pressure; change film
Low Removal Rate	Grit too fine or worn-out film	Use coarser grit for initial steps
Film Peeling	Improper PSA or surface prep	Ensure clean, dry surface before applying
Polishing Pad Swelling	Excessive slurry or oil	Use minimal slurry or switch liquid type

Choosing the Right Grit Size

Selecting the proper diamond film grit depends on your application goals:

Application	Recommended Grit (Micron)
Fiber Optic Ferrule Pre-Polish	15μm → 9μm
Fiber Optic Ferrule Final Polish	3μm → 1μm → 0.3μm → 0.1μm
Glass or Quartz Surface Lapping	30μm → 9μm → 3μm
Ceramic or Sapphire Wafer Polish	15μm → 6μm → 1μm
Semiconductor Cross-Sectioning	1μm → 0.5μm → 0.1μm
Metal Surface Refinement	30μm → 15μm → 3μm → 0.5μm

If unsure, start with a mid-range grit (e.g., 6μm) and adjust depending on material hardness and finish requirements.

Why Choose Us Diamond Lapping Film

Equivalent to 3M 661X and 663X series
Consistent particle distribution for uniform polishing
Strong adhesion, even under wet conditions
Available in custom sizes and grit combinations
Large inventory, fast delivery, OEM & private label service