Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Reexamination Certificate
1999-03-30
2001-09-25
Ramsey, Kenneth J. (Department: 2879)
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
C445S024000, C449S030000, C449S030000, C449S030000
Reexamination Certificate
active
06293843
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method for producing an electrochromic device.
2. Prior Art
An electrochromic device is generally produced by sealing the periphery, except for a portion thereof, of a pair of electrically conductive substrates, at least one of which is transparent, placed in a spaced-apart opposing relationship with each other so as to assemble a cell having an injection port formed by the unsealed portion and filling the inner space of the cell by charging through the port an electrolyte or the precursor thereof in a vacuum. The injection port of the cell is then sealed by filling and curing therein a photo-setting or thermosetting acrylic resin or epoxy resin adhesive.
However, such a method for sealing or closing the port requires a step of removing the electrolyte adhered around the injection port prior to filling the adhesive. If the electrolyte is not removed completely, the adhesive can not seal the port sufficiently. Furthermore, the above sealing method falls to obtain satisfactory sealing strength due to an insufficient cure of the adhesive caused by the contact thereof with the electrolyte.
Japanese Laid-Open Patent Publication Nos. 2-114237 and 6-250230 disclose a two-step sealing method to solve the foregoing problems.
Japanese Laid-Open Patent Publication No. 2-114237 discloses a method which comprises a primary sealing and a secondary sealing. In this method, first of all, there is prepared a cell having an opening formed in a selected portion of the peripheral edges of a pair of substrates in an opposing relation. After an electrolyte is charged through the opening, the primary sealing is conducted by coating an epoxy resin adhesive to the opening while an external pressure is vertically applied to the substrates, followed by releasing the pressure to allow the sealant to enter into the inside of the opening and cure therein. After a certain period of time, the secondary sealing is carried out by coating an epoxy resin adhesive on the peripheral edges of the substrate including the primary sealed portion and allowing the adhesive to cure itself.
This method is recognized as being applicable to the production for a electrochromic device of a relatively small size. However, the method is not always suitable for the production for an elecrochromic device of a relatively large size because the primary sealing requires the process of applying an external pressure onto the cell. Furthermore, this two-step sealing method is mainly focused on the injection port (opening) provided on the end surface of the cell. Therefore, when this method is employed for producing the large electrochromic device, there may arise a risk that the adhesive would peel off due to the stress applied to the sealing portion upon transportation of the device even though the sealing is completed in a satisfactory manner.
Japanese Laid-Open Publication No. 6-250230 proposes a method in which an electrolyte injection port is sealed with a radiation-cure type adhesive and then sealed with an epoxy resin adhesive so as to be overlapped with the former adhesive. However, with this method the above risk can not be removed because it also attempts to solve the above problem by providing the electrolyte injection port in the end surface of the cell.
An object of the invention is to provide a method for producing an electrochromic device whose which sealing portion of the electrolyte injection port is free from the peel off of the adhesive by arranging an electrolyte injection passage formed by a member which is made of a press-deformable material and adjusted in orientation so as to extend suitably from the port through the sealed edge of the opposed substrates, even upon being employed for the production of a large size electrochromic device on which stress would possibly applied during the transportation of the device.
Another object of the invention is to provide a method for producing an electrochromic device. The method can avoid completely the contact between an electrolyte and an adhesive to be used for sealing the electrolyte injection port and thus is also free from a risk that the curing reaction of the adhesive is hindered.
SUMMARY OF THE INVENTION
According to the invention, there is provided a method for producing an electrochromic device which comprises:
(a) a step of assembling a hollow cell constituting an electrochromic device by sealing together the entire peripheral edges of two electrically conductive substrates, at least one of which is transparent, disposed in a spaced-apart opposing relationship with each other and by providing at least a portion of the sealed edge with an opening, whose surroundings are formed by a press-deformable member, having a passage extending not perpendicular to the end surface of the opposed substrates;
(b) a step of vacuum-inserting an electrolyte or the precursor thereof through the opening into the cell;
(c) a step of closing the opening by pressing deformably the surroundings after completion of the injection;
(d) a step of sealing the dosed opening with an adhesive.
REFERENCES:
patent: 3926502 (1975-12-01), Tanaka et al.
patent: 3990782 (1976-11-01), Yamasaki
patent: 4095876 (1978-06-01), Horsting et al.
patent: 4640583 (1987-02-01), Hoshikawa et al.
patent: 02-114237 (1990-04-01), None
patent: 06-250230 (1994-09-01), None
Kobayashi Masa-aki
Nishikitani Yoshinori
Toya Tomohiro
Uchida Soichi
Akin Gump Strauss Hauer & Feld L.L.P.
Nippon Mitsubishi Oil Corporation
Ramsey Kenneth J.
Santiago Mariceli
LandOfFree
Method for producing an electrochromic device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing an electrochromic device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing an electrochromic device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2544217