NOVELTY - The method involves preparing base material with joining membrane (3). The case (2) and base material are laminated so that region is contacted with joining membrane, while activating the region. The base material is peeled from obtained temporary joining structure, for transferring joining membrane corresponding to region of case, to obtain another temporary joining structure. A leaving group is disconnected from siloxane bond. Another temporary joining structure and cover structure (4) are laminated, to oppose joint surface (401), and to obtain joined structure.    USE - Method for joining case and cover in manufacture of sealing-type device (claimed) such as crystal resonator. Can also be used in joining of transistor, diode, memory, reflective mirror, optical lens, diffraction grating, optical filter, solar cell, semiconductor substrate, semiconductor element, insulated substrate, wiring, electrode, ink jet-type recording head, micro-reactor, micro-electromechanical system (MEMS) components like micro-mirror, package components of semiconductor element or electronic component, magnetic recording medium, magneto-optical recording medium, recording medium like optical recording medium, components for fuel cell, in manufacture of piezoelectric actuator, piezoelectric oscillator, surface acoustic wave element (SAW) device, fluorescent lamp, discharge lamp, LED, semiconductor laser, photodiode, LCD element, organic electroluminescent (EL) element, plasma display, electrophoretic display element, charge coupled device (CCD), complementary metal oxide semiconductor (CMOS), acceleration sensor, angular speed sensor, pressure sensor, wavelength variable filter, biosensor, fiber optic connector, optical modulator, integrated circuit (IC) package, identification (ID) tag, IC card, and wristwatch.    ADVANTAGE - The sealing-type device can be manufactured reliably and simply. Hence the efficiency of sealing-type device can be increased by controlling the joining region of element provided with joining membrane transferred on element surface. The precise and homogenous joining membrane is efficiently produced since joining membrane is made up of plasma polymerization membrane. The hermetic sealing of closed space can be reliably performed with joining membrane, since a frame-shaped region is formed around the circumference of region corresponding to the closed space. The quality change and deterioration of electrical wiring provided in quartz crystal vibrating element or recess can be prevented, while decreasing the vibration resistance of quartz crystal vibrating element. High degree airtightness is achieved for maintaining a pressure reduction state or inert gas filling state over a long time required for junction portion of the case and cover structure. The adhesiveness of lamination interface can be improved, when the joining membrane transfer sheet is laminated with the case. The lamination non-uniformity of the joining membrane transfer sheet and the case can be suppressed and joining membrane can be transferred reliably, when flexible base material is provided in temporary joining structure. The base material is reliably peeled from the temporary joining structure based on the interface of base material and joining membrane. The adhesion strength of the case and the joining membrane can be raised reliably, while cleaning the surface of the case. The joint strength of crystal resonator can be improved since the surface of each joint surface is maintained in active state. Generation of curvature in crystal resonator can be prevented reliably. The thermal stress in the joining interface can be reduced even when thermal expansion rate difference is set to the maximum. The quality and deterioration of each joining membrane can be reduced and total amount of energy provided to each joining membrane can be reduced, while transferring the joining membrane. The local concentration of stress produced in junction portion can be relieved by optimizing the shape and area of each joining membrane. The thermal expansion produced in the joining interface of crystal resonator can be relieved. Peeling of the joining interface and the airtight destruction are prevented reliably.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for manufacturing the sealing-type device.    DESCRIPTION OF DRAWING(S) - The drawing shows the disassembled perspective view of the crystal resonator.    Case (2)    Joining membrane (3)    Cover structure (4)    Quartz crystal vibrating element (5)    Joint surface (401)