Mechanical Engineering ETDs

Publication Date

Fall 11-9-2020


Typical high-voltage, wound film-foil capacitors have large edge margins filled with air to prevent breakdown between foil electrodes. This arrangement is inefficient for energy density and leaves a volume where particulates may settle in an uncontrolled atmosphere. The reliability and size of high-voltage, wound film-foil capacitors could be improved by adding a material with higher breakdown strength into the edge margins. This will not only improve reliability and size but also act as a barrier to prevent foreign object debris (FOD), volatile organic compounds (VOCs), and water from damaging the capacitor’s performance. This paper will discuss the process of determining a suitable material and the process of prefilling the edge margins with a material using a reel-to-reel coating machine.


Dry wrap and fill, PET capacitor, Edge margin, High voltage, Mylar

Degree Name

Mechanical Engineering

Level of Degree


Department Name

Mechanical Engineering

First Committee Member (Chair)

Nathan Jackson

Second Committee Member

Yu-Lin Shen

Third Committee Member

Alex Robinson

Document Type