Patent ID: 8632800

Claim:
A device for administration of a pharmaceutical agent to an individual through a body surface, comprising: a. a reservoir having a first matrix comprising at least one pharmaceutical agent in the first matrix, the reservoir having a reservoir outer perimeter; b. a first backing layer attached to the reservoir and substantially impermeable to the pharmaceutical agent, the first backing layer having a first backing layer outer perimeter; c. a second matrix layer permeable to the pharmaceutical agent, the second matrix layer having a second matrix layer outer perimeter; and d. a barrier layer disposed between the reservoir and at least part of the second matrix layer, the barrier layer having a barrier layer outer perimeter that is smaller than the second matrix layer outer perimeter, the reservoir outer perimeter being smaller than the barrier layer outer perimeter, the barrier layer being of a material that is substantially impermeable to the pharmaceutical agent wherein the barrier layer has a window through which at least one of the second matrix layer and the first backing layer can extend to attach to the other layer; wherein at least part of the second matrix layer is disposed above the reservoir, as measured from the surface to which the device is applied.