US Patent 10987668 Test card with well shelf

Provided herein are a test card, method of manufacturing the same, and mold for manufacturing the same. The test card may include a body and a well. The body may include a first surface and a second surface opposite the first surface. The well may define an opening extending from the first surface to the second surface and configured to receive a sample therein. The well may further include a shelf extending into the opening, such that the opening is narrower between the shelf and the second surface than between the shelf and the first surface.