How can I draw in solidworks a laser welded pillow plate

How can I draw in solidworks a laser welded pillow plate(is consisted of two inox plates, the top plate 0.8mm thickness and the bottom plate 2mm thickness spot and linear welded together with a pattern in order to make path for Freon of a cooling system).After the weldment in order to give to the top plate the pillow shape we burst from holes nitrogen and because of the thickness deference we get this shape only to the top plate.(if the thickness is equal the deformation will be in both plates) See the attached pictures

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