Abstract: Disclosed is a server and a method for providing a multi-subscription service. The method performed by the server includes receiving a subscription request for a target merchandise from a user terminal, querying another merchandise to which a user account is subscribing in response to the subscription request being received, determining a usage period of the target merchandise for which a subscription is requested based on a usage period of the other merchandise in response to the other merchandise being queried, calculating a payment amount for an initial subscription of the target merchandise based on the determined usage period, requesting a payment of the calculated payment amount by the user terminal, and providing the target merchandise to the user terminal in response to the payment by the user terminal being approved.

Abstract: A phase shift mask comprising a light-transmitting substrate, a plurality of uniformly spaced phase shift regions formed over the light-transmitting substrate, and a plurality of light shield regions formed over the light-transmitting substrate, each of the light shield regions being disposed at opposite sides of the phase shift regions. Each light shield region has substantially the same thickness as the phase shift regions. The phase shift regions are made of a conductive metal, thereby requiring no additional conductive film for avoiding charging phenomena. The light shield regions are made of an inexpensive metal such as zinc, which typically is less expensive than materials such as chromium. Any environmental contamination caused by waste disposal or the like also may be avoided in that heavy metals such as chromium need not be used.