An oil pressure relief valve for use in the oil pump lubrication system of an internal combustion engine is controlled by both oil pump outlet pressure and by pilot pressure from a pilot valve which is selectively applied by a control member, preferably a two-way valve that is operated by the engine control module. In various embodiments, a potential barrier arrangement is configured to block the flow of charge carriers generated outside a photosensitive region. Specifically disclosed is a separator for energy devices, which comprises a nonwoven fabric laminate composed of two or more melt-blown nonwoven fabric layers arranged on top of one another. The buffer layer breaking step includes a first laser beam applying step of completely breaking the buffer layer corresponding to an optical device area and a second laser beam applying step of incompletely breaking the buffer layer corresponding to a peripheral marginal area. Also provided are a susceptor and a method of depositing a film onto a substrate affixed to the susceptor of the present invention. In some embodiments, the divider divides a tracheal ventilation lumen from a bronchial ventilation lumen.