A fluid ejection device comprising a composite substrate, wherein the composite substrate has two substrates with a patterned etch mask therebetween, and a fluid channel. The concentration of the solution stability additive varies based on the complexing capability of the additive. Electrically conductive buss bars form an electrical circuit between the dices of N-type conductivity and the dices of P-type conductivity. The method further including determining a center of an innermost cutter on each primary blade, creating a partial connection between the primary blades, and outputting the model of the fixed cutter drill bit. These sector-shaped output beams together form an output beam having an angle approximately of 360 degrees.