METHOD OF FORMING A FLUID DELIVERY SLOT

Disclosed is a printhead including a substrate having a plurality of fluid heating elements. At least one fluid delivery slot delivers fluid to the plurality of fluid heating elements. The fluid delivery slot is defined by first and second substantially parallel side walls and first and second curved end walls. The fluid delivery slot is formed using a rotary cutting saw. The rotary cutting saw is used to form the fluid delivery slot in a single plunge cut or using the combination of a plunge cut and a drag cut. The use of the rotary cutting saw to form the fluid delivery slot produces narrow ink delivery slots thereby allowing the printhead substrate to exhibit an overall size reduction, as well as an increase in strength.