H.K.Founders Ltd.

FLAT LAPPING PLATES


Introduction

H.K. Founders supply cast iron lapping plates specifically for use within the silicon and quartz wafer industries.  The iron has been created using a martensitic form of spheroidal graphite.  This matrix offers longer life with enhanced wafer TTV's.  The RANGE also includes alternative iron materials for individual applications.

Lapping PlateOur lapping plates are available for sizes from 500mm to 2100mm diameter for Peter Wolters AL2F and AC range, Fujikoshi and Speedfam, Mitsunaga double sided lapping machines, single sided lapping plates are available for Peter Wolters and Hoffman machines.  Plates are supplied in a grooved STYLE or machined flat.

Martensite SampleTo match the characteristics of our iron we have a series of conditioning CARRIERS/gears.

Our policy is one of continuous development which has given SUPPORT to improve production of our customers products.  Typical is the round bottomed groove used in the cross hatch style plate.

All plates are custom made in ISO 9001 registered facilities.

Please send your drawing for a quotation.

Unit K, Soloman Road, Cossall Industrial Estate, Ilkeston, Derbyshire.  DE7 5UA. England.

Telephone: +44 (0) 115 930 7515.  Facsimile: +44 (0) 115 930 4988. 

Telephone: +44 (0) 870 285 6010.  Facsimile: +44 (0) 870 285 6012. 

E-mail: Sales@hk-founders.co.uk

 

 

HK Plate Properties
Material Designation

Tensile Strength

N/mm2

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

 

STYLE

Typically, crosshatched or serrated plates provide for the most efficient lapping. The abrasive slurry is more evenly dispersed through the channels formed by the grooves. Concentric and radial grooving are also available, as well as flat plates.

CROSS HATCH

scan14.jpg (194424 bytes)A typical cross-hatch grooved plate available in sets of upper and lower plates fully machined to suit individual machines. Plate sizes from 800mm to 2200mm in diameter, at a thickness to meet machine requirement.

All plates are cast and heat treated to provide a through hardness and structure maximising life, minimising scratch rates and improving wafer TTV.

Grooves are machined at pitches to our specification or to customer requirements.  All plates have an individual number to provide product traceability and the continuous monitoring of performance.

 

RADIAL

scan16.jpg (806328 bytes)Radial grooved plates are supplied for quartz wafer production in plates up to 1000 mm diameter.  Our martensite material is used offering exceptional life expectancy.

Groove pitch is to customer requirements and are machined on a 4 axis computer controlled machining centre in a controlled environment.

 

Conditioning Carrier

hkcarrier1.jpg (389848 bytes)One of many styles of conditioning carrier in use.  hkpw.jpg (487720 bytes)All sizes and tooth profiles are produced to suit the individual machines. Standard hardness in material matches our plates to ensure the conditions suit martensite characteristics. Conditioning gears are provided as sets with plates or as a separate tooling item. 

SUPPORT

Image18.jpg (302660 bytes)Cross hatch grooves of 2 and 3mm widths are machined with a radius bottom to reduce slurry entrapment in the corners of square grooves and give additional strength to the plate.

 

 

Image_12.jpg (438140 bytes) The edge of the plates can be supplied with a wide radius edge or traditional chamfer depending on customer preference.

 

Image10.jpg (262552 bytes)Upper plate slurry holes can be fitted with plastic inserts to the depth of the groove bottom.  This improves slurry pipe connection and reduces slurry or rust pockets developing.