Stencil mask and stencil printing method

A stencil mask for printing a fluid material onto a substrate, wherein the substrate comprises a substrate surface, a cavity having a cavity bottom surface below the substrate surface, and at least one printing region within the cavity;

• and wherein the stencil mask comprises:
• a non-reinforcement portion having a mask surface configured to contact the substrate surface;
• and
• a reinforcement portion having a thickness greater than that of the non-reinforcement portion, wherein the reinforcement portion comprises:
• an embossed surface for insertion into the cavity of the substrate and configured to contact the cavity bottom surface when the stencil mask is placed onto the substrate for stencil printing;
• and
• at least one first stencil window that allows the fluid material to flow through the reinforcement portion, wherein the at least one first stencil window is aligned with the at least one printing region within the cavity when the stencil mask is placed onto the substrate for stencil printing.