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PACE Technologies metallographic Lapping Films consumables Metallographic Lapping Film Information



Diamond, Silicon Carbide and Alumina Lapping Films

Metallographic lapping films

The applications for lapping films range from polishing semiconductor dies, fiber optics, optical components, ceramic capacitors, computer hard drive read-write heads, ceramic seals, etc. The main characteristic of lapping films is that they produce very flat surfaces, especially across materials with a wide range in hardness.

Lapping films consist of a polyester backing (typically 3 mils) on which the abrasive is rigidly fixed with an epoxy binder. The most common abrasives used for lapping films include diamond, silicon carbide, alumina and to a lesser extent ceria.


Diamond lapping films are precision coated abrasives using precisely graded diamond. A very flexible adhesive bonding agent is used which tenaciously hold the abrasive particles to the backing. This provides a tough, durable, tear-resistant abrasive plastic film which is waterproof and resistant to many solvents.

Diamond lapping films provide less polishing relief than intermediate rough polishing cloths and provide a fixed diamond grinding mode. Diamond lapping films are exceptional abrasives for preparing microelectronic materials for SEM and TEM analysis.

Silicon carbide lapping films are bonded or coated abrasive films of SiC designed so that the abrasive will have a large number of cutting points (negative abrasive rank angle). This is achieved by aligning the abrasive particles approximately normal to the backing. Note that coated abrasives are not quite coplanar, thus SiC papers produce the maximum efficiency (cut rate, stock removal and minimal damage) because new abrasive is exposed as the old abrasive breaks down.

Alumina lapping films consist of an aluminum oxide, which is a naturally occurring material (Bauxite). It exits in either the softer gamma (mohs 8) or harder alpha (mohs 9, 2000 HV) phase. Alumina abrasives are used primarily as a final polishing abrasive because of its high hardness and durability


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PACE Technologies metallographic Lapping Films consumables
Recommended Procedures (Lapping Films)

For plain backed diamond lapping films For PSA backed diamond lapping films

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PACE Technologies metallographic Lapping Films consumables


Trouble Shooting for Lapping Films Polishing

Symptom Cause Action
Coarse scratching -Swarf build-up on the lapping film -Use a lubricant with an appropriate surfactant
Tearing of pad -Sharp specimen edges -Reduce intitial applied load so that the specimen edge does not cut the film. Gradually increase pressure during the lapping operation.
-Dispense lubricant more frequently
Excessive relief or edge rounding -PSA backing providing too much flexibility (resiliency)
-Lapping backing plate surface is not flat
-Use a plain backed diamond lapping film
-Use a flat lapping surface

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PACE Technologies metallographic Lapping Films consumables


Diamond Lapping Films
Description Size (inches) Catalog Number
(Plain-backed)
Catalog Number
(PSA backed)
Color Code
0.10 um Diamond Lapping Film Up to 12-inches DA-01 DAA-01 Metallographic 0.01 micron diamond lapping film
0.25 um Diamond Lapping Film Up to 12-inches DA-025 DAA-025 Metallographic 0.5 micron diamond lapping film
0.50 um Diamond Lapping Film Up to 12-inches DA-052 DAA-05 Metallographic 0.5 micron diamond lapping film
1 um Diamond Lapping Film Up to 12-inches DA-1 DAA-1 Metallographic 1 micron diamond lapping film
3 um Diamond Lapping Film Up to 12-inches DA-3 DAA-3 Metallographic 3 micron diamond lapping film
6 um Diamond Lapping Film Up to 12-inches DA-6 DAA-6 Metallographic6 micron diamond lapping film
9 um Diamond Lapping Film Up to 12-inches DA-9 DAA-9 Metallographic 9 micron diamond lapping film
15 um Diamond Lapping Film Up to 12-inches DA-15 DAA-15 Metallographic 15 micron diamond lapping film
30 um Diamond Lapping Film Up to 12-inches DA-30 DAA-30 Metallographic 30 micron diamond lapping film

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PACE Technologies metallographic Lapping Films consumables


Diamond Lapping Film Lubricants
Description Quanitiy (oz) Catalog Number
32 oz Diamond Lapping Film Lube 32 LFL-032
1 gallon Diamond Lapping Film Lube 128 LFL-128

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PACE Technologies metallographic Lapping Films consumables


Silicon Carbide Lapping Films
Description Size (inches) Catalog Number
(Plain-backed)
Catalog Number
(PSA backed)
1.0 um silicon carbide Up to 12-inches SIC-001PB-3 SIC-001PSA-3
3.0 um silicon carbide Up to 12-inches SIC-003PB-3 SIC-003PSA-3
5.0 um silicon carbide Up to 12-inches SIC-005PB-3 SIC-005PSA-3
9.0 um silicon carbide Up to 12-inches SIC-009PB-3 SIC-009PSA-3
12 um silicon carbide Up to 12-inches SIC-012PB-3 SIC-012PSA-3
20 um silicon carbide Up to 12-inches SIC-020PB-3 SIC-020PSA-3
30 um silicon carbide Up to 12-inches SIC-030PB-3 SIC-030PSA-3

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PACE Technologies metallographic Lapping Films consumables


Alumina Lapping Films
Description Size (inches) Catalog Number
(Plain-backed)
Catalog Number
(PSA backed)
Color Code
0.05 um alumina (ALO) Up to 12-inches ALO-105PB-3 ALO-105PSA-3 Metallographic 0.05 micron alumina lapping film
0.30 um alumina (ALO) Up to 12-inches ALO-103PB-3 ALO-103PSA-3 Metallographic 0.30 micron alumina lapping film
1.0 um alumina (ALO) Up to 12-inches ALO-001PB-3 ALO-001PSA-3 Metallographic 1 micron alumina lapping film
3.0 um alumina (ALO) Up to 12-inches ALO-003PB-3 ALO-003PSA-3 Metallographic 3 micron alumina lapping film
5.0 um alumina (ALO) Up to 12-inches ALO-005PB-3 ALO-005PSA-3 Metallographic 5 micron alumina lapping film
9.0 um alumina (ALO) Up to 12-inches ALO-009PB-3 ALO-009PSA-3 Metallographic 1 micron alumina lapping film
12 um alumina (ALO) Up to 12-inches ALO-012PB-3 ALO-012PSA-3 Metallographic 12 micron alumina lapping film
15 um alumina (ALO) Up to 12-inches ALO-015PB-3 ALO-015PSA-3 Metallographic 15 micron alumina lapping film
30 um alumina (ALO) Up to 12-inches ALO-030PB-3 ALO-030PSA-3 Metallographic 30 micron alumina lapping film

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