Plates For Flat Lapping

Cast-iron lapping plates supplier.

At H.K Founders Ltd, we supply premium cast-iron lapping plates for all types of industrial applications, especially for the silicon and quartz wafer industries. Call us for more details.

Durable lapping plates for various applications

The cast iron we use for our lapping plates is created using a martensitic form of spheroidal graphite, which extends the longevity and durability, and also enhances wafer TTVs. We also use alternative iron materials for individual applications.

Our high quality lapping plates are available in different specifications, (from 500mm to 2100mm diameter) for Peter Wolters’ AL2F and AC range, Fujikoshi and Speedfam, and Mitsunaga double-sided lapping machines. Single-sided lapping plates are available for Peter Wolters and Hoffman machines. Our plates are custom-made in ISO 9001 registered facilities, and are supplied in a grooved style or machined flat. 
Send us your drawing for a quotation. We also provide plates for ball manufacturing Worldwide.
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HK plate properties

HK00 
Tensile strength: 480
Elong (%): 19
HB: 140-175
HSD: 22-26 
Type: S.G.
Structure: 85% ferrite
HK01
Tensile strength: 430
Elong (%): 26
HB: 125-140
HSD: 21-22
Type: S.G.
Structure: Ferrite
HK10
Tensile strength: 500
Elong (%): 8
HB: 175-200
HSD: 27-31
Type: S.G.
Structure: Ferrite/pearlite
HK20
Tensile strength: 600
Elong (%): 9
HB: 200-235
HSD: 31-36
Type: S.G.
Structure: Martensite
HK30
Tensile strength: 700
Elong (%): 2
HB: 235-290
HSD: 36-44
Type: S.G.
Structure: Martensite
HK40 
Tensile strength: 200
HB: 175-205
HSD: 27-32
Type: Grey
Structure: Flake
HK45
Tensile strength: 300
HB: 190-230
HSD: 30-36
Type: Grey
Structure: Flake



Cross-hatch

Types of lapping plates

Cross-hatch
Our cross-hatch grooved plates are fully machined to suit individual machines, and are available in sets of upper and lower plates. The sizes available are 800mm to 2200mm in diameter, at a thickness to meet the machine’s requirements.

In order to provide a thorough hardness, to enhance longevity, to improve wafer TTV and to minimise scratch rates, all plates are cast and heat treated.

Grooves are machined at pitches to our specifications or as per our customer’s requirements. All plates have an individual number. This is to provide product traceability and the continuous monitoring of performance.

Radial
Radial grooved plates are made from our martensite material in order to improve life expectancy. They’re available in plates up to 1000 mm diameter and are supplied for quartz wafer production

Groove pitch is machined on a 4-axis computer controlled machining centre in a controlled environment, as per customer’s requirements.

Radial

Conditioning carriers

Conditioning carrier
To match the characteristics of our iron, we have a series of conditioning carriers or gears. All sizes and tooth profiles of our conditioning carriers are produced to suit the requirements of individual machines. We ensure that the standard hardness in material matches our plates so that the conditions suit martensite characteristics. 

Support

Support
At H.K. Founders, we aim to provide continuous development, and also give support to improve production of our customers’ products, typically for the round-bottomed groove, used in the cross hatch style plate.

Our cross hatch grooves of both 2 and 3 mm widths are machined with a radius bottom. This is to reduce slurry entrapment in the corners of square grooves and to give additional strength to the plate.

The edge of the plates can be supplied with a wide radius edge or traditional chamfer as per your preference.


The upper plate slurry holes can be fitted with plastic inserts to the depth of the groove bottom. This helps in improving slurry pipe connection and also reduces slurry or the development of rust pockets. 
Are you looking for durable, hard-wearing lapping plates for a double-sided lapping machine? Call H.K Founders Ltd on 
+44 (0)115 882 0350
+44 (0)115 930 7515

Or send a drawing via :
E-Mail : sales@hk-founders.co.uk
Fax : +44 (0) 115 882 0580

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