Patent ID: 11872573
Assignee: STAMFORD DEVICES LIMITED
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  A | IPC A  B  C

Claim 15:
16. A method of manufacturing an aperture plate wafer, the method comprising:
applying a mask over a substrate in a pattern of columns, each column having a height between 40-50 μm, at least some of the columns in the pattern of columns tapering to define a frustoconical bottom portion with a convex top surface;
electroplating a plating material around the columns to form a first thickness;
over-plating the plating material directly on the top surfaces of the pattern of columns to form a second thickness and so as to form a plurality of aerosol-forming apertures, wherein the first thickness is greater than the second thickness; and
removing the plated material from the mask and the substrate to provide a wafer of electroplated material with the plurality of aerosol-forming apertures aligned with tapered entrainment portions with a height of at least 40-50 μm based on a height of each column of the mask;
forming the aperture plate wafer into a dome shape such that the tapered entrainment portions increase in size and the aperture plate wafer is concave on a side of the apertures.