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May 09, 2008
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Sintered Blades are blades that have been created by capturing diamonds in a metal binder using a sintering process. This creates blades with very high rigidity and very low wear rates. Because of this rigidity a sintered blade has the ability to create very straight cuts even when subjected to large exposures. It also means these blades will last a very long time. The slotted versions of these blades are especially good at singulating BGA and QFN packages. Non slotted blades have a tendency to smear the soft metals in these packages which will cause shorting between the layers. We can supply both slotted and non-slotted formats. Slots allow more cooling water to get down into the kerf which means the blade will run cooler and last longer. Slots also expedite removal of debris from the bottom of the kerf. Unlike regular slotted blades our slots are manufactured with stress reliefs. The stress reliefs show up as a circular cutout in the bottom of each slot. This spreads the stress over a larger area which mitigates one of the primary failure mechanisms of non stress relieved slotted blades. Rather than using a standard punch process, the cutting edge of our blades, along with the slots are produced using a Synova Laser Water Jet. This creates a blade that has a very symmetrical profile. This means that the blade requires less dressing to get it to run true. It also means that changes in the bulk material along the cutting edge are minimized which leads to more consistent cuts. Materials that can be cut are FR4, green ceramic, BGA and QFN packages. |
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