NOVELTY - The method involves patterning joining film (3) with base material in predetermined shape. The leaving group is disconnected from siloxane frame. Energy is provided to peeling surface and patterned joining film. The joining element is obtained by laminating base material and case (2) using adhesive in joining film. Another joining element is obtained by peeling base material from joining element and transferring joining element. The joint surface (401) of base material is mutually opposed by laminating another joining element and cover element (4) using adhesive.    USE - Method for joining case and cover of sealing-type device (claimed) such as crystal resonator during manufacture. Can also be used in manufacture 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 and hence 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 of plasma polymerization membrane. The hermetic sealing of closed space can be reliably performed with joining membrane, since frame-shaped region surround the circumference of region corresponding to 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. The 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 case and cover structure. The adhesiveness of lamination interface can be improved, when joining membrane transfer sheet laminates with case. The lamination non-uniformity of joining membrane transfer sheet and 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 obtained temporary joining structure based on interface of based material and joining membrane. The adhesion strength of case and joining membrane can be raised reliably, while cleaning surface of 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 joining interface can be reduced even when thermal expansion rate difference is set to 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 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 joining interface of crystal resonator can be relieved. Peeling of joining interface and airtight destruction are prevented reliably.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacturing method of sealing mold device.    DESCRIPTION OF DRAWING(S) - The drawing shows the exploded perspective view of the crystal resonator.    Case (2)    Joining film (3)    Cover element (4)    Quartz crystal vibrating element (5)    Joint surface of base material (401)