Biomedical assay device
First Claim
1. A structural unit comprising an integrated diagnostic form, the diagnostic form comprising:
- a polymeric substrate;
an active ingredient, electrostatically deposited on the surface of said substrate; and
a porous spreading layer electrostatically deposited on the active ingredient, said spreading layer comprising particles of controlled particle size, wherein said spreading layer serves to retain and spread a sample of liquid which is to be diagnosed.
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Accused Products
Abstract
The present invention provides an integrated structural unit that includes a diagnostic form that includes at least one active ingredient that is present in an amount that advantageously does not vary by more than about five percent from a predetermined target amount. In one embodiment, the unit form comprises a substrate, a deposit that is disposed on the substrate, and a spreading layer that overlies the deposit and is used to retain and spread a sample of liquid which is to be assayed. The deposit comprises a powder, including the active ingredient(s). The diagnostic form is created via a dry powder deposition apparatus that electrostatically deposits the powder on the substrate utilizing an electrostatic chuck and charged powder delivery apparatus.
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Citations
11 Claims
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1. A structural unit comprising an integrated diagnostic form, the diagnostic form comprising:
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a polymeric substrate;
an active ingredient, electrostatically deposited on the surface of said substrate; and
a porous spreading layer electrostatically deposited on the active ingredient, said spreading layer comprising particles of controlled particle size, wherein said spreading layer serves to retain and spread a sample of liquid which is to be diagnosed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification