Patent Publication Number: US-2016230271-A1

Title: Heating vessel for preventing leakage of high temperature metal material and manufacture method thereof

Description:
FIELD OF THE INVENTION 
     The present invention relates to a heating vessel, and more particularly to a heating vessel for preventing leakage of high temperature metal material and a manufacture method thereof. 
     BACKGROUND OF THE INVENTION 
     OLED (Organic Light Emitting Diode) possesses advantages of being all-solid state, ultra thin, no view angle limited, fast responding, room temperature workable, easy achievable flexible displaying and 3D displaying. It is supposed to be the main stream technology of next generation display. At present, heating vapor coating is a main manufacture way of the OLED elements. The coating material is heated in vacuum by using a heating vessel. The vapor coating material which is sublimable or fusable is vaporized under the high temperature circumstance and deposited on a substrate having TFT compositions or anode compositions. 
     During the present vapor deposition according to prior arts, a single layer vessel is commonly utilized as the vaporization vessel to be heated for vaporization. Nevertheless, micro cracks appear so common at the joint of the lateral side and the bottom of the heating vessel caused by condensation and shrinkage of the high temperature metal liquid and then material abnormal loss happens. Moreover, the high temperature liquid may outflow from the micro cracks and into the heating apparatus to lead to the internal short circuit and damage to the whole heating apparatus. Consequently, the OLED production progress is interrupted and the production quality descends. The fracture and leakage of the heating vessel are very difficult to be confirmed and hard to predict because the micro cracks are not easy to be found under the cooling status. 
     Please refer to  FIG. 1A  and  FIG. 1B .  FIG. 1A  is a structure diagram of an OLED heating vessel according to prior art.  FIG. 1B  is a sectional diagram of  FIG. 1A . The OLED heating vessel is utilized in the OLED vapor deposition process in prior arts. A top cap  2  is positioned on the top of the heating vessel. The top cap  2  comprises a vapor hole  1 . The material  3  contained in the heating vessel is heated up and vaporized. Then, it can escape from the vapor hole  1  as indicated by the arrows. When the heating vessel is damaged, the material  3  may leak from the fractures  4  and flow into the heating apparatus. The material  3  can be massively lost and the vaporized rate may drop to interrupt the production progress. Meanwhile, without being aware, the material  3  is possible to be filled and gets into the heating apparatus. There will be possibility to result the damages to the heating apparatus. 
     SUMMARY OF THE INVENTION 
     Therefore, an objective of the present invention is to provide a heating vessel for preventing leakage of high temperature metal material to overcome the issue of the material loss due to the heating vessel damage and to protect the heating apparatus. 
     Another objective of the present invention is to provide a manufacture method of the heating vessel for preventing leakage of high temperature metal material to make the heating vessel to overcome the issue of the material loss due to the heating vessel damage and to protect the heating apparatus. 
     For realizing the aforesaid objective, the present invention provides a heating vessel for preventing leakage of high temperature metal material, comprising: an internal heating vessel employed for containing metal material, an external heating vessel employed to be heated by a heating apparatus and a top cap having a vapor hole employed for escape of the vaporized metal material; the internal heating vessel is completely contained in the external heating vessel and positionally fixed relative to the external heating vessel, and an interspace exists between a side wall of the internal heating vessel and a side wall of the external heating vessel, and the top cap is fixed on tops of the internal heating vessel and the external heating vessel to cover opens of the internal heating vessel and the external heating vessel. 
     Material of the internal heating vessel and material of the external heating vessel are the same. 
     The heating vessel is employed as a heating vessel in an OLED vapor deposition. 
     A bottom of the internal heating vessel and a bottom of the external heating vessel contact with each other. 
     An interspace exists between a bottom of the internal heating vessel and a bottom of the external heating vessel. 
     The internal heating vessel and the external heating vessel are crucibles. 
     The tops of the internal heating vessel and the external heating vessel are welded as one body. 
     The top cap is chucked and fixed with the tops of the internal heating vessel and the external heating vessel at the same time. 
     The present invention also provides a heating vessel for preventing leakage of high temperature metal material, comprising: an internal heating vessel employed for containing metal material, an external heating vessel employed to be heated by a heating apparatus and a top cap having a vapor hole employed for escape of the vaporized metal material; the internal heating vessel is completely contained in the external heating vessel and positionally fixed relative to the external heating vessel, and an interspace exists between a side wall of the internal heating vessel and a side wall of the external heating vessel, and the top cap is fixed on tops of the internal heating vessel and the external heating vessel to cover opens of the internal heating vessel and the external heating vessel; 
     wherein material of the internal heating vessel and material of the external heating vessel are the same; 
     wherein the heating vessel is employed as a heating vessel in an OLED vapor deposition; 
     wherein the internal heating vessel and the external heating vessel are crucibles. 
     A bottom of the internal heating vessel and a bottom of the external heating vessel contact with each other. 
     An interspace exists between a bottom of the internal heating vessel and a bottom of the external heating vessel. 
     The tops of the internal heating vessel and the external heating vessel are welded as one body. 
     The top cap is chucked and fixed with the tops of the internal heating vessel and the external heating vessel at the same time. 
     The present invention also provides a manufacture method of the heating vessel, comprising: 
     Step 1, measuring an outer dimension and an inner dimension of an internal heating vessel; 
     Step 2, selecting an external heating vessel which an inner dimension is capable of covering the internal heating vessel; 
     Step 3, lowering a height of the external heating vessel according to a height of the internal heating vessel; 
     Step 4, completely containing the internal heating vessel in the external heating vessel and positionally fixing the internal heating vessel relative to the external heating vessel. 
     The present invention also provides another manufacture method of the heating vessel, comprising: 
     Step 11, measuring an outer dimension and an inner dimension of an external heating vessel; 
     Step 21, selecting an internal heating vessel which an outer dimension is capable of to be contained in the external heating vessel; 
     Step 31, lowering a height of the internal heating vessel according to a height of the external heating vessel; 
     Step 41, completely containing the internal heating vessel in the external heating vessel and positionally fixing the internal heating vessel relative to the external heating vessel. 
     In conclusion, the heating vessel for preventing leakage of high temperature metal material of the present invention overcomes the issues of the material abnormal loss and production progress interruption due to the appeared fracture in daily usages. The continuous steady running period of the heating apparatus is effectively promoted and the quality of the production is guaranteed; meanwhile, the manufacture method of the heating vessel is convenient and fast, and the cost is low. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The technical solution, as well as beneficial advantages, of the present invention will be apparent from the following detailed description of an embodiment of the present invention, with reference to the attached drawings. 
       In the attached drawings, 
         FIG. 1A  is a structure diagram of an OLED heating vessel according to prior art; 
         FIG. 1B  is a sectional diagram of  FIG. 1A ; 
         FIG. 2  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the first preferable embodiment of the present invention; 
         FIG. 3  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the second preferable embodiment of the present invention; 
         FIG. 4  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the third preferable embodiment of the present invention; 
         FIG. 5  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the fourth preferable embodiment of the present invention; 
         FIG. 6  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the fifth preferable embodiment of the present invention; 
         FIG. 7  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the sixth preferable embodiment of the present invention; 
         FIG. 8  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the seventh preferable embodiment of the present invention; 
         FIG. 9  is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the eighth preferable embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     Please refer to  FIG. 2 , which shows a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the first preferable embodiment of the present invention. In this and the following embodiments, cylinder-shaped heating vessels are illustrated and the sectional diagram is made along the diameter direction of the cylinders. The eating vessel for preventing leakage of high temperature metal material of this preferable embodiment comprises: an internal heating vessel  27  employed for containing metal material, an external heating vessel  25  employed to be heated by a heating apparatus and a top cap  22  having a vapor hole  21  employed for escape of the vaporized metal material; the internal heating vessel  27  is completely contained in the external heating vessel  25  and positionally fixed relative to the external heating vessel  25 , and an interspace exists between a side wall of the internal heating vessel  27  and a side wall of the external heating vessel  25 , and the top cap  22  is fixed on tops of the internal heating vessel  27  and the external heating vessel  25  to cover opens of the internal heating vessel  27  and the external heating vessel  25 . 
     The heating vessel is employed as a heating vessel in an OLED vapor deposition. The internal part and the external part of the heating vessel can be made by the same material but different in dimension. The internal heating vessel  27  and the external heating vessel are crucibles  25 , wherein the tops thereof are not welded but merely chucked with the top cap  22 . The top cap  22  can be a buckle structure for buckling the upper edges of the internal heating vessel  27  and the external heating vessel  25 . The top cap  22  has a vapor hole  21  in center, employed for escape of the vaporized material  23 . Bottoms of the two vessels do not contact with each other. The heating apparatus heats up the external heating vessel  25 . The external heating vessel  25  conducts the heat to the internal heating vessel  27  by irradiation. The material  23  is contained only in the internal heating vessel  27 . As the internal heating vessel  27  is heated up, the material  23  is vaporized. The vapor of the material  23  escapes from the vapor hole  21  of the top cap  22 . When the internal heating vessel  27  is damaged and fractures  24  appear, both the material  23  in the internal heating vessel  27  and leaked material  26  in the interspace are vaporized and escape from the vapor hole  21 . 
     The aforesaid OLED vapor deposition device can maintain the normal production progress under the circumstance that the internal heating vessel is damaged with the improvement of the heating vessel. The material abnormal loss and the damage to the heating apparatus do not happen. The double layer OLED material vaporizing vessel efficiently reduces the risk of material loss due to the damage of the vessel and prevents the risk of the damage to the heating apparatus. Moreover, the continuous steady running period of the heating apparatus is increased. 
     With the improvement of the traditional heating vessel according to the present invention, a present single layer Bessel is improved to be a double layer heating vessel. When the damages and fractures appear at the joint of the heating vessel, the material leakage and loss can be efficiently controlled and the entire heating apparatus can be protected. The quality and the progress of the production can be guaranteed. 
     Please refer to  FIG. 3 , which is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the second preferable embodiment of the present invention. The heating vessel comprises the internal heating vessel  37  and the external heating vessel  35  which are made by the same material, wherein the tops thereof are not welded but merely chucked with the top cap  32 . The top cap  32  has a vapor hole  31  in center, employed for escape of the vaporized material  33 . Bottoms of the two vessels contact with each other. The heating apparatus heats up the external heating vessel  35 . The external heating vessel  35  conducts the heat to the side wall of the internal heating vessel  37  by irradiation and conducts the heat to the internal heating vessel  37  through the bottoms. As the internal heating vessel  37  is heated up, the material  33  is vaporized. The vapor of the material  33  escapes from the vapor hole  31  of the top cap  32 . When the internal heating vessel  37  is damaged and fractures  34  appear, both the material  33  in the internal heating vessel  37  and leaked material  36  in the interspace are vaporized and escape from the vapor hole  31 . 
     Please refer to  FIG. 4 , which is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the third preferable embodiment of the present invention. The heating vessel comprises the internal heating vessel  47  and the external heating vessel  45  which are made by the same material, wherein the tops thereof are welded and bottoms of the two vessels do not contact with each other. The heating apparatus heats up the external heating vessel  45 . The external heating vessel  45  conducts the heat to the internal heating vessel  47  by irradiation. As the internal heating vessel  47  is heated up, the material  43  is vaporized. The vapor of the material  43  escapes from the vapor hole  41  of the top cap  42 . When the internal heating vessel  47  is damaged and fractures  44  appear, only the material  43  in the internal heating vessel  47  is vaporized and escapes from the vapor hole  41 . The leaked material  46  is kept in the intersapce. 
     Please refer to  FIG. 5 , which is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the fourth preferable embodiment of the present invention. The heating vessel comprises the internal heating vessel  57  and the external heating vessel  55  which are made by the same material, wherein the tops thereof are welded and bottoms of the two vessels contact with each other. The heating apparatus heats up the external heating vessel  55 . The external heating vessel  55  conducts the heat to the side wall of the internal heating vessel  57  by irradiation and conducts the heat to the internal heating vessel  57  through the bottoms. As the internal heating vessel  57  is heated up, the material  53  is vaporized. The vapor of the material  53  escapes from the vapor hole  51  of the top cap  52 . When the internal heating vessel  57  is damaged and fractures  54  appear, only the material  53  in the internal heating vessel  57  is vaporized and escapes from the vapor hole  51 . The leaked material  56  is kept in the intersapce. 
     Please refer to  FIG. 6 , which is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the fifth preferable embodiment of the present invention. The heating vessel comprises the internal heating vessel  67  and the external heating vessel  65  which are made by the same material, wherein the tops thereof are not welded but merely chucked with the top cap  62 . The top cap  62  has a vapor hole  61  in center, employed for escape of the vaporized material  63 . Bottoms of the two vessels do not contact with each other. The heating apparatus heats up the external heating vessel  65 . The external heating vessel  65  conducts the heat to the internal heating vessel  67  by irradiation. As the internal heating vessel  67  is heated up, the material  63  is vaporized. The vapor of the material  63  escapes from the vapor hole  61  of the top cap  62 . When the internal heating vessel  67  is damaged and fractures  64  appear, the material  63  in the internal heating vessel  67  is vaporized and escapes from the vapor hole  61 . 
     Please refer to  FIG. 7 , which is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the sixth preferable embodiment of the present invention. The heating vessel comprises the internal heating vessel  77  and the external heating vessel  75  which are made by the same material, wherein the tops thereof are not welded but merely chucked with the top cap  72 . The top cap  72  has a vapor hole  71  in center, employed for escape of the vaporized material  73 . Bottoms of the two vessels contact with each other. The heating apparatus heats up the external heating vessel  75 . The external heating vessel  75  conducts the heat to the side wall of the internal heating vessel  77  by irradiation and conducts the heat to the internal heating vessel  77  through the bottoms. As the internal heating vessel  77  is heated up, the material  73  is vaporized. The vapor of the material  73  escapes from the vapor hole  71  of the top cap  72 . When the internal heating vessel  77  is damaged and fractures  74  appear, the material  73  in the internal heating vessel  77  are vaporized and escapes from the vapor hole  71 . 
     Please refer to  FIG. 8 , which is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the seventh preferable embodiment of the present invention. The heating vessel comprises the internal heating vessel  87  and the external heating vessel  85  which are made by the same material, wherein the tops thereof are welded and bottoms of the two vessels do not contact with each other. The heating apparatus heats up the external heating vessel  85 . The external heating vessel  85  conducts the heat to the internal heating vessel  87  by irradiation. As the internal heating vessel  87  is heated up, the material  83  is vaporized. The vapor of the material  83  escapes from the vapor hole  81  of the top cap  82 . When the internal heating vessel  87  is damaged and fractures  84  appear, only the material  83  in the internal heating vessel  87  is vaporized and escapes from the vapor hole  81 . 
     Please refer to  FIG. 9 , which is a sectional diagram of a heating vessel for preventing leakage of high temperature metal material according to the eighth preferable embodiment of the present invention. The heating vessel comprises the internal heating vessel  97  and the external heating vessel  95  which are made by the same material, wherein the tops thereof are welded and bottoms of the two vessels contact with each other. The heating apparatus heats up the external heating vessel  95 . The external heating vessel  39  conducts the heat to the side wall of the internal heating vessel  97  by irradiation and conducts the heat to the internal heating vessel  97  through the bottoms. As the internal heating vessel  97  is heated up, the material  93  is vaporized. The vapor of the material  93  escapes from the vapor hole  91  of the top cap  92 . When the internal heating vessel  97  is damaged and fractures  94  appear, only the material  93  in the internal heating vessel  97  is vaporized and escapes from the vapor hole  91 . 
     The present invention also provides a manufacture method in accordance with the heating vessel, comprising: 
     Step 1, measuring an outer dimension and an inner dimension of an internal heating vessel; 
     Step 2, selecting an external heating vessel which an inner dimension is capable of covering the internal heating vessel; 
     Step 3, lowering a height of the external heating vessel according to a height of the internal heating vessel; after lowering the height of the external heating vessel, the top of the external heating vessel is aligned with the top of the internal heating vessel horizontally. 
     Step 4, completely containing the internal heating vessel in the external heating vessel and positionally fixing the internal heating vessel relative to the external heating vessel; the top portions of the two vessels can be melted and welded as one body. Alternatively, the top cap can be utilized to be chucked to fix the internal heating vessel and the external heating vessel positionally relative to each other. 
     After the manufacture is accomplished, the proper material can be put in the heating apparatus to be heated up; the thickness parameters are calibrated according to the vapor deposition process. The manufactured heating vessel overcomes the issue of the material loss due to the heating vessel damage and to protect the heating apparatus at the same time. 
     Another provided manufacture method comprises: 
     Step 11, measuring an outer dimension and an inner dimension of an external heating vessel; 
     Step 21, selecting an internal heating vessel which an outer dimension is capable of to be contained in the external heating vessel; 
     Step 31, lowering a height of the internal heating vessel according to a height of the external heating vessel; after lowering the height of the internal heating vessel, the top of the internal heating vessel is aligned with the top of the external heating vessel horizontally. 
     Step 41, completely containing the internal heating vessel in the external heating vessel and positionally fixing the internal heating vessel relative to the external heating vessel; the top portions of the two vessels can be melted and welded as one body. Alternatively, the top cap can be utilized to be chucked to fix the internal heating vessel and the external heating vessel positionally relative to each other. 
     After the manufacture is accomplished, the proper material can be put in the heating apparatus to be heated up; the thickness parameters are calibrated according to the vapor deposition process. 
     By utilizing the double layer design for the heating vessel, the heating vessel for preventing leakage of high temperature metal material of the present invention overcomes the issues of the material abnormal loss and production progress interruption due to the appeared fracture in daily usages. The continuous steady running period of the heating apparatus is effectively promoted and the quality of the production is guaranteed; meanwhile, the manufacture method of the heating vessel is convenient and fast, and the cost is low. 
     Above are only specific embodiments of the present invention, the scope of the present invention is not limited to this, and to any persons who are skilled in the art, change or replacement which is easily derived should be covered by the protected scope of the invention. Thus, the protected scope of the invention should go by the subject claims.