Abstract: A SAW device includes: a SAW chip having a piezoelectric substrate and transmitting and receiving transducers; a circuit board formed with conductive inner contacts, each of which is connected electrically to a respective one of the transmitting and receiving transducers; a first adhesive-confining curb interconnecting the circuit board and the transmitting and receiving transducers and cooperating with the circuit board and the SAW chip to define an enclosed cavity thereamong; a second adhesive-confining curb surrounding the first adhesive-confining curb to define a sealing space therebetween; an adhesive body filling the sealing space; and a molding compound covering the SAW chip and connected sealingly to the second adhesive-confining curb.

Abstract: A network management system by using network interface cards installed with network management software comprises a main control device in a network; a network main control software being installed to the main control device; and a plurality of information devices connected to the main control device through the network; each of the information device being installed with one of the network interface cards; a driver of the network interface card being installed with a network management software corresponding to the network main control software.

Abstract: The present invention discloses an HWDM (10) and a method of producing the same. The HWDM includes a WDM element (20), two receiving sleeves (30), (40), two shrink sleeves (50) and an outer tube (60). The WDM element includes a first, second, third and fourth optical fibers (21˜24). The first optical fiber is fused with the second fiber to form a first fusion region (211), and with the third fiber to form a second fusion region (212). The second fiber and the fourth fiber are fused to form a third fusion region (221). The receiving sleeves respectively contain the first fusion region and the second and third fusion regions therein. Each shrink sleeve attaches to a corresponding receiving sleeve. The outer tube receives two receiving sleeves therein.