201223733 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種鍵帽之方法。本發明特別是關於一種 形成具有發光層以及符號層鍵帽之方法。 【先前技術】 隨著科技的進步，各式各樣的電子裝置已經充斥在現代 ® 人的日常生活中，同時還帶給了人們一個便利的生活環境。 舉例來說，桌上型電腦、筆記型電腦及行動電話等電子裝 置，已經成為人們生活及工作的必要工具之一。一般來說， 使用者需利用輸入裝置來操作電子裝置。例如，利用滑鼠或 鍵盤來進行移動游標或者輸入資料的動作。 近年來，由於資訊產業發展迅速，許多使用者可能在不 同環境下使用攜帶型資訊裝置。電腦的設計概念在一方面即 # 走向越來越輕薄短小的趨勢，以方便隨身攜帶，而筆記型電 腦或個人數位助理等，就是因應此趨勢的下的產物。 以筆記型電腦為例，在使用者於不同環境使用筆記型電 腦時，常因為使用者所處環境較暗，光線較微弱的緣故，會 無法清楚辨識鍵盤上的符號，造成使用者打字或是輸入資訊 時輸入錯誤的字元，甚至是完全看不見按鍵的位置。一旦輸 入錯誤的字元，使用者必須清除錯誤字元後再繼續輸入，如 此造成使用者的不便，造成作業困難。 201223733 桌上型電腦也是如此，若是使用者使用桌上逛電腦時， 使用者所處環境昏暗，或是光源、無法缺的照亮桌上型電腦 的鍵盤結構時，使用者經常於打字或是輸人資訊時輸入錯誤 的字兀，導致使肖者再的重複輸人，這樣會讓使用者 眼睛過疲勞度增加，嚴重者甚至可能因勉強辨識按鍵標示而 讓視力受損。 因此，發光鍵盤的推出能改善於光線不足處使用鍵盤之 不便。更甚者，藉由不同的發光配置，可令使用發光鍵盤的 資訊裝置看起來較美觀進而增加其銷路。 因此，便有針對此一問題所提出之改良方案，使按鍵可 發出主動光源，以克服人們在昏暗環境中使用鍵盤所造成的 不便，目前市面上出現具有發光元件之鍵盤。常見的配置方 式是將多個發光元件設置於一電路板上，並且將設置有多個 發光元件的電路板設置在鍵盤的一側邊。發光元件發射的光 線經由一導光板均勻地擴散至鍵盤的各按鍵下方，以使各按 鍵具有發光的效果。 背光模組之發光源目前有冷陰極射線管(Cold Cathode Fluorescent Lamp，CCFL) ' 熱陰極射線管（Hot Cathode Fluorescent Lamp，HCFL)、電激發光片（Electro Luminscence, EL)以及發光二極體(Light emitting diode，LED)等發光源。已 知有發光鍵盤係以EL或LED作為其背光模組之發光源’或 包括使用發光顏料或螢光標籤。但是’發光顏料或螢光標籤 在使用上易於脫落或螢光標籤遺失，而導致差的持久性。 201223733 根據上述諸點缺失之考量，仍然需要一種形成能夠具有 自發光性質之鍵帽與鍵盤之方法，提供使用者在低照度下仍 然可以清楚辨識按鍵符號的方便。 【發明内容】 本發明即在於提出一種形成能夠具有自發光性質之鍵 帽與鍵盤之方法。此㈣帽與鍵盤可以提供使用者在低照度 下，仍然可以清楚辨識按鍵符號的方便。 本發明即提供-種鍵帽之製法。首先，提供可透光之一 保護層。其次，進行—發光層印刷步驟。此等印刷步驟會在 保護層上印刷—發光層。發光層包含-發光材料。，然後，進 f一符號層印刷步驟。此等印刷步驟會在保護層上印刷一符 號層。再來’進行—底色印刷步驟。此等印刷步驟會在包含 發光層以及符號層之保護層上印刷—底色^接著，進行一 缚膜熱壓成型步驟。此等印刷步驟會在將包含底 :以::，保護層經由一成型模具，轉變成-殼狀薄 膜賴’進订-塑膠射出步驟。此等印刷步驟會將殼狀薄 膜經由-轉成型模具，使 ^ σ . ^ ^•巴層上形成一殼體填充層。 所付之成扣包含複數個相連之鍵帽。 矣月帛實施態樣中’在各步驟之後可以視情 光層印刷步驟後，可以進:二:二貫施態樣中’在進行發 三實施態樣中，在：:二:層印刷步驟。在本發明-第 曰Ρ刷步驟前，可以進行符號層 201223733 印刷步驟。在本發明一第四實施態樣中’還進行一表色層印 刷步驟，而在保護層上印刷一表色層。在本發明一第五貫施 態樣中，發光材料包含一種硫化物、一種鋁氧化物、一稀土 元素、一螢光材料與一磷光材料之至少一種。在本發明一第 六實施態樣中，發光材料可以是硫化鋅（ZnS)、硫化鈣 (CaS)、勰鋁氧化物（SrAl204)、鈣鋁氧化物（CaAl204) 與鋇鋁氧化物（BaAl204)。在本發明一第七實施態樣中，因 為成品包含複數個相連之鍵帽，所以還可以再進行一沖切步 驟，而將具有殼體填充層之殼狀薄膜製成複數個獨立之鍵 帽。在本發明一第八實施態樣中’沖切步驟係利用一沖切模 具進行沖切。在本發明一第九實施態樣中’沖切步驟係利用 一雷射切割進行沖切。 【實施方式】 本發明在於提供一種形成能夠具有自發光性質之鍵帽 與鍵盤之方法，其中之發光層印刷步驟與符號層印刷步驟， 可以視情況將換順序。所得之鍵帽與鍵盤可以提供使用者在 低照度下，仍然可以清楚辨識按鍵符號的方便。 請參考第1圖至第7A圖，繪示本發明製造鍵帽之方法。 首先，請參考第1圖與第8圖，提供可透光之一保護層110。 保護層110係用來保護鍵帽中其他元件免於外界之傷害，例 如灰塵、水氣與刮痕，但又必需使得位於下方之符號清晰可 見。保護層110通常包含一高分子材料，例如聚碳酸酯薄膜 201223733 .與聚乙二醇醋薄膜其中之至少-種。舉例而言，保護層110 可以具有1毫米_G.8毫米之厚度。視情況需要，可以進行一 色ΓΓ:111。例如，於保護層110上印刷嶋 刷卜表色層m，並送入—供烤褒置1〇2中進行 1A圖所繪示。 巧戈弟 其次’請參考第2圖與第8圖’進行一 12〇°此等印刷步驟⑽會在保護層no上印刷一發光；驟 # 光層121 1蓋會料層UG。在賴層U〇上印 刷了啦先層12!之後，視情況需 102中進行烘烤。 定了以送人供烤裝置 榮料，例如硫化物、銘氧化物、或是稀土 ㈣可以具有適當之厚度，例如⑽微求·Η)0 极未厚度之硫化鋅、硫化鈣、如 ㈣化物Μ μ (吨化物、_氧化物與锅 之發光時間。 t具有較局之亮度與較長 之後然Ϊ進請參I:圖與第8圖，在發光層印刷步驟12。201223733 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a method of a keycap. More particularly, the invention relates to a method of forming a keycap having a light-emitting layer and a symbol layer. [Prior Art] With the advancement of technology, a variety of electronic devices have been filled in the daily life of modern ® people, while also giving people a convenient living environment. For example, electronic devices such as desktop computers, notebook computers, and mobile phones have become one of the necessary tools for people to live and work. Generally, the user needs to use an input device to operate the electronic device. For example, use a mouse or keyboard to move a cursor or enter data. In recent years, due to the rapid development of the information industry, many users may use portable information devices in different environments. On the one hand, the design concept of the computer is trending towards becoming thinner and lighter, so that it can be carried around with you, while the notebook computer or personal digital assistant is the product of this trend. Taking a notebook computer as an example, when a user uses a notebook computer in different environments, often because the user is in a dark environment and the light is weak, the symbol on the keyboard cannot be clearly recognized, causing the user to type or Enter the wrong character when entering the information, or even the position of the button is completely invisible. Once the wrong character is entered, the user must clear the error character and continue to input, thus causing inconvenience to the user and making the operation difficult. 201223733 The same is true for desktop computers. If the user is using a computer on the table, the user is in a dark environment, or the light source is indispensable to illuminate the keyboard structure of the desktop computer. Users often type or When you input the wrong information, you can enter the wrong word, which will cause the reader to repeat the input. This will increase the user's eye fatigue. In severe cases, the visual acuity may be impaired because the button is barely recognized. Therefore, the introduction of the illuminated keyboard can improve the inconvenience of using the keyboard in low light. What's more, with different lighting configurations, the information device using the illuminated keyboard can look more beautiful and increase its sales. Therefore, there is an improved solution proposed for this problem, so that the button can emit an active light source to overcome the inconvenience caused by the use of the keyboard in a dim environment, and a keyboard having a light-emitting element is currently available on the market. A common configuration is to arrange a plurality of light-emitting elements on a circuit board, and to provide a circuit board provided with a plurality of light-emitting elements on one side of the keyboard. The light emitted by the light-emitting element is uniformly diffused under the respective keys of the keyboard via a light guide plate, so that each button has a light-emitting effect. The illumination source of the backlight module currently has a Cold Cathode Fluorescent Lamp (CCFL) 'Hot Cathode Fluorescent Lamp (HCFL), an Electro Luminescence (EL), and a Light Emitting Diode ( Light emitting diode, LED, etc. It is known that an illuminated keyboard uses EL or LED as the illumination source of its backlight module' or includes the use of luminescent pigments or fluorescent labels. However, luminescent pigments or fluorescent labels are prone to detachment or loss of fluorescent labels, resulting in poor durability. 201223733 According to the above-mentioned missing points, there is still a need for a method of forming a keycap and a keyboard capable of having self-illuminating properties, and providing the user with the convenience of clearly recognizing the key symbols under low illumination. SUMMARY OF THE INVENTION The present invention is directed to a method of forming a keycap and a keyboard capable of having self-luminous properties. The (four) cap and keyboard can provide the user with the convenience of clearly recognizing the button symbols under low illumination. The present invention provides a method of making a key cap. First, a protective layer that provides light transmission is provided. Next, a light-emitting layer printing step is performed. These printing steps print on the protective layer - the luminescent layer. The luminescent layer comprises a luminescent material. Then, proceed to the f-symbol layer printing step. These printing steps print a symbol layer on the protective layer. Then come to the - bottom color printing step. These printing steps are printed on the protective layer comprising the luminescent layer and the symbol layer. The underlying color is then applied to a bonded film thermoforming step. These printing steps will include a bottom: with::, the protective layer is transformed into a -shell-like film-substrate-plastic injection step via a forming die. These printing steps will form a shell-filled layer on the layer of ^ σ . ^ ^• via a-turn molding die. The buckles that are paid include a plurality of connected keycaps. In the implementation of the model, 'after each step, you can follow the process of printing the light layer. You can enter: two: two-way application in the three implementations, in the :: two: layer printing step . The symbol layer 201223733 printing step can be performed before the step of the present invention - the first brushing step. In a fourth embodiment of the invention, a color layer printing step is also performed, and a color layer is printed on the protective layer. In a fifth aspect of the invention, the luminescent material comprises at least one of a sulfide, an aluminum oxide, a rare earth element, a phosphor material, and a phosphorescent material. In a sixth embodiment of the present invention, the luminescent material may be zinc sulfide (ZnS), calcium sulfide (CaS), lanthanum aluminum oxide (SrAl204), calcium aluminum oxide (CaAl204) and lanthanum aluminum oxide (BaAl204). . In a seventh embodiment of the present invention, since the finished product includes a plurality of connected keycaps, a further punching step can be performed, and the shell-shaped film having the shell filling layer is made into a plurality of independent keycaps. . In an eighth embodiment of the invention, the blanking step is performed by a die cutting die. In a ninth embodiment of the invention, the 'punching step' is performed by a laser cutting. [Embodiment] The present invention provides a method of forming a keycap and a keyboard capable of having self-luminous properties, wherein the luminescent layer printing step and the symbol layer printing step can be reversed as appropriate. The resulting keycap and keyboard provide the user with the convenience of clearly recognizing the key symbols under low illumination. Referring to Figures 1 to 7A, a method of manufacturing a keycap of the present invention is illustrated. First, please refer to FIGS. 1 and 8 to provide a protective layer 110 that can transmit light. The protective layer 110 is used to protect other components in the keycap from external damage, such as dust, moisture and scratches, but it is necessary to make the symbols below clearly visible. The protective layer 110 usually comprises a polymer material such as a polycarbonate film 201223733 and at least one of the polyethylene glycol vinegar films. For example, the protective layer 110 may have a thickness of 1 mm to G. 8 mm. A color ΓΓ: 111 can be used as the case requires. For example, the enamel color layer m is printed on the protective layer 110 and fed into the baking slab 1 〇 2 for illustration. Qiao Gedi Secondly, please refer to Fig. 2 and Fig. 8 for a 12°. These printing steps (10) will print a light on the protective layer no; the step #光层121 1 covers the material layer UG. After printing the first layer 12 on the La layer, it is necessary to bake in 102 cases. It is determined to give a person a roasting device, such as a sulfide, an oxide, or a rare earth (4), which may have a suitable thickness, for example, (10) micro-required, zero-thickness, zinc sulfide, calcium sulfide, such as (tetra) Μ μ (the luminescence time of ton, _ oxide and pot. t has a relatively brighter brightness and longer afterwards, please refer to I: Fig. and Fig. 8, in luminescent layer printing step 12.
=—付#彻步驟13〇，所以會在保護層HO Ρ刷一付號層131。之後，視情況需要，還可以送入一烘 烤裝置102中進行烘烤。 、 '、 層131表面包含至少—符號〗32。符號層⑶中之 別對應每個日後形成之鍵帽。符號層 琥132可以是數字，例如1、2、3、4 ς 。、6、7、8、9、0， 201223733 或是各種語言所需之字母，例的、尸n小 g ' w ' r ' Λ ' > Λ TW、&、t··等等’或是各種語言輸人時所需之文字，例 如艸$、牛、虫…等等’或是其他書寫時所需之符號，例 如£、€、#、*、@、&、！、（、）、+ “、、/...等等。 在本發明之一實施態樣中，符號層13i中之符號132可 以只有-個，也可以多個同時並列。例如，不同之數字、字 母、文字與㈣並列，也可以是不同語言之數字、字母、文 字與符號並列，方便使用者切換使用。在本發明之另一實施 態樣中，符號層131中之不同符號132可以包含至少一個顏 色，或是包含多個顏色，例如紅色、黃色、綠色、藍色以及 黑色等等多個色彩，以利使用者清楚分辨。 在本發明之—實施態樣中，請參考第3圖與第8圖，發 先層印刷步驟12G與符號層印刷㈣⑽的順序可以視情況 加以改變。例如發光層印刷步驟12()的順序在符號 ㈣〇之前，使得符號層131中之符號132看起來較亮此。 另一方面’請參考第3A圖，發光層印刷步驟m的順序—在 符號層印刷㈣130之後，使得符號層13〇中之符號⑶=—Pay #Step 13〇, so a layer 131 will be applied to the protective layer HO. Thereafter, it may be fed to a baking apparatus 102 for baking as occasion demands. , ', layer 131 surface contains at least - symbol〗 32. The symbol layer (3) corresponds to each of the key caps formed in the future. The symbol layer suffix 132 can be a number, such as 1, 2, 3, 4 ς . , 6, 7, 8, 9, 0, 201223733 or the letters required for various languages, for example, corpse n small g ' w ' r ' Λ ' > Λ TW, &, t··, etc.' or It is the text required for the input of various languages, such as 艸$, cow, worm, etc.' or other symbols required for writing, such as £, €, #, *, @, &,! , (,), + ",, /, etc. In one embodiment of the present invention, the symbols 132 in the symbol layer 13i may be only one or a plurality of simultaneous juxtapositions. For example, different numbers The letters, the characters and the (4) are juxtaposed, and may be juxtaposed by numbers, letters, characters and symbols in different languages, so that the user can switch the use. In another embodiment of the present invention, the different symbols 132 in the symbol layer 131 may include At least one color, or multiple colors including a plurality of colors, such as red, yellow, green, blue, and black, for the user to clearly distinguish. In the embodiment of the present invention, please refer to Figure 3. As with Fig. 8, the order of the pre-printing step 12G and the symbol layer printing (4) (10) can be changed as appropriate. For example, the order of the illuminating layer printing step 12() is preceded by the symbol (4), so that the symbol 132 in the symbol layer 131 looks On the other hand, please refer to Figure 3A, the order of the luminescent layer printing step m - after the symbol layer printing (four) 130, the symbol in the symbol layer 13 ( (3)
起來較清楚些，因此可以是情況轉所需之適#實施 而達成較佳之結果。 I 再來，請參考第4圖與第8圖，在符號層印刷步驟m 之後，又進行-底色印刷步驟140。此等印刷步驟i4〇 包含發光層121符號層131之保護層11〇上印刷—底色層 201223733 141。之後，視情況需要，包含發光層121符號層131之保 護層110還可以送入一烘烤裝置102中進行烘烤。 底色層141係作為視覺上符號層131與發光層121之對 比基礎。底色層141 it常包含一塑膠材料，所以可以是一種 具有淺底色之塑膠薄膜。例如，底色層141的顏色可以白色 (Whlte)、象牙白（iv〇ry)、乳白色（milk white)、雪白色 (snowy white)、乳白色（〇yster white)、青白色（ φ White) /炎灰色（丨ight grey)、淺藍色（lightblue)、淺綠色 (nghtgreen)、淺黃色（丨ightyell〇w)、米色（）…等等。 接著，請參考第5圖與第8圖，在底色印刷步驟14〇之 後’再進行-薄膜熱壓成型步驟15G。此等印刷步驟將包含 底色層141、發光層121以及符號層131之保護層ιι〇置於 一成型模具上，經由成型模具，底色層141、發光層121、 符號層m以及保護層110會一起轉變成一成型殼狀薄膜 151。 、 籲如第5A及第5B圖所示之熱壓成型的方法，係利用氣 體壓力（第5A圖中之箭頭部份）向成型模具152方向進行施 壓’而使高溫下軟化的薄膜153貼附於成型模具152上，進 而形成-近似於鍵帽殼體的凹凸造型。或者，亦有利用公模 及母模的熱壓合方式，令薄膜153成型特定造型，如第5b 圖所不，成型模具152係分為一公模154及一母模155，利 用公模154及母模155之加熱後壓*，即可使薄膜153達到 201223733 在本發明之-實施態樣中，可以利用底色層i4i與成型 模具152接觸來達到熱壓成型，實際上，依不同成型模具152 設計’其相對位置亦得倒置。例如，將成型模具152設置於 薄膜153之下方’而氣體藶力向下。也就是說’在薄臈敎壓 成型步驟⑼中，與成型模具152接觸之表面，可以是薄膜 153之表面或底色層141之表面，如第沾圖所示。 /繼續，請參考第6圖與第8圖，在薄膜熱壓成型步驟15〇 之後再進行塑膠射出步驟16〇。此等印刷步驟會將殼狀薄 膜151經由一塑膠成型模具⑹，使得底色層141上形成一 · 殼體填充層162。所得之成品包含複數個相連之鍵帽⑹。 ,如第6圖所示，將熱壓成型後之殼體狀薄膜151由成型 模具152上取下，再置於一塑膠成型模具ΐ6ι上進行塑膠射 出成型薄殼的作業，使底色層141上形成一殼體填充層/ 162°殼體填充層162除了主要於薄膜153之任—表面成型 薄殼外’另外亦可補足薄膜153在薄膜熱壓成型步驟15〇時 成型不足的問題。例如，雖然薄臈成型步驟15G可以將薄膜鲁 153賦予-特定的造型，惟此造型若受到溫度的影響而收、 縮’或是受到材料本身的物性回彈而收縮時，塑膠射出步驟 16〇即可利用射出時的充填壓力增加薄膜153的造形成型 度。 忒體填充層161為本創作發光鍵帽殼體162中位於下方 之基礎支撐7C件（basie supp(ming )。殼體填充層⑹ 為一堅固（solid)之支撐^件’通常包含一填充材料。例如， 10 201223733 殼體填充層161包含一種聚合物，例如，聚合物可以是一硬 性塑膠與—軟性轉之至少—者。硬性塑膠可以是工程塑料 等，軟性矽膠可以是矽橡膠（siliconerubber)等。殼體填充 層161之尺寸可以視應用之場合而加以調整。例如，應用於 行動裝置中，殼體填充層161之尺寸可以較小，並可^平面 結構，以構成多層堆疊的鍵盤輸入裝置，符合「輕、薄、短、 小」之一般要求。另一方面，當應用於較大之桌上性裝置中， φ设體填充層U0之尺寸可以稍大，並可為立體結構，圖示中 之多層堆疊的’以便利使用者之操作。 請參考第7圖與第8圖，在塑膠射出步驟16〇之後視 情況需要還可以再進行沖切步驟17〇。例如，將具有殼體填 充層之薄膜153由塑膠成型模具161上取下，並進行預定位 置之沖切’即形成複數個鍵帽殼體163。 如第7圖所示，沖切的方法係可利用一沖切模具171的 方式來達成，或者如第7A圖所示，使用一雷射光172進行 籲切割，而直接加工於鍵帽殼體163與鍵帽殼體163之間的連 結位置（即未有塑膠射出薄殼處），使鍵帽殼體163成為獨立 的元件，以利後續製程。由第7圖/第7A圖可知，由於保護 層110係為可透光，因此，使用者可由鍵帽殼體162外部直 接觀看到符號層中之符號132。而且因為發光層121之照 明，使得使用者即使在低照度的條件下，依然可以清楚的辨 別鍵帽殼體163中符號層内之符號132所標示之文字、符號 或圖形。 11 201223733 第8圖繪示本發明鍵帽製法之流程圖如第8圖所示。第 9圖繪示本發明鍵帽製法之另一流程圖’視情況需要’在表 色印刷步驟111後，又可包括一符號顏色印刷步驟113，或 是一符號多色印刷步驟114。如第9圖所示，即可使得不同 之符號132呈現多種不同之顏色。視情況需要，還可以重覆 進行符號多色印刷步驟114至少一次。 以上所述僅為本發明之較佳實施例，凡依本發明申請專利範圍 所做之均等變化與修飾，皆應屬本發明之涵蓋範圍。 g 【圖式簡單說明】 第1圖繪示提供可透光之一保護層。 第2圖繪示進行一發光層印刷步驟。 第3圖及第3A圖繪示進行一符號層印刷步驟。 第4圖繪示進行一底色印刷步驟。 第5圖繪示進行一薄膜熱壓成型步驟。 第5A及第5B圖繪示熱壓成型的方法。 籲 第6圖繪示進行塑膠射出步驟。 第7圖繪示利用沖切模具來達成沖切步驟。 第7A圖繪示使用雷射光來達成沖切步驟。 第8圖繪示本發明鍵帽製法之流程圖。 第9圖繪示本發明鍵帽製法之另一流程圖。 【主要元件符號說明】 12 201223733 102烘烤裝置 110保護層 111表色印刷步驟 112表色層 113符號顏色印刷步驟 114符號多色印刷步驟 120發光層印刷步驟 121發光層 130符號層印刷步驟 131符號層 132符號 140底色印刷步驟 141底色層 150薄膜熱壓成型步驟 151殼狀薄膜 • 152成型模具 153薄膜 154公模 155母模 160塑膠射出步驟 161塑膠成型模具 162殼體填充層 163鍵帽 201223733 170沖切步驟 171沖切模具 172雷射光It is clearer, so it can be a better result if the situation is changed. I. Referring again to Figures 4 and 8, after the symbol layer printing step m, a bottom color printing step 140 is performed. These printing steps i4〇 include a protective layer 11 on the symbol layer 131 of the light-emitting layer 121, and a bottom layer 201223733 141. Thereafter, the protective layer 110 including the symbol layer 131 of the light-emitting layer 121 may be fed into a baking apparatus 102 for baking as occasion demands. The under color layer 141 serves as a basis for comparison between the visual symbol layer 131 and the light-emitting layer 121. The underlayer 141 it often contains a plastic material, so it can be a plastic film having a light background. For example, the color of the ground layer 141 may be white (Whlte), ivory (iv〇ry), milky white, snowy white, yyster white, blue white ( φ White) / inflammation Gray (丨ight grey), light blue (lightblue), light green (nghtgreen), light yellow (丨ightyell〇w), beige ()... and so on. Next, referring to Figs. 5 and 8, the film thermal pressing step 15G is performed after the background printing step 14 is performed. These printing steps place the protective layer including the underlying layer 141, the luminescent layer 121, and the symbol layer 131 on a molding die, through the molding die, the underlying layer 141, the luminescent layer 121, the symbol layer m, and the protective layer 110. Together, they are transformed into a molded shell film 151. The method of hot press forming as shown in Figs. 5A and 5B is to apply a gas pressure (the arrow portion in Fig. 5A) to the molding die 152 to apply a film 153 which is softened at a high temperature. Attached to the molding die 152 to form a concave-convex shape similar to the key cap housing. Alternatively, the film 153 may be formed into a specific shape by a thermocompression bonding method using a male mold and a female mold. As shown in FIG. 5b, the molding die 152 is divided into a male mold 154 and a female mold 155, and the male mold 154 is used. And after heating and pressing the master mold 155, the film 153 can reach 201223733. In the embodiment of the present invention, the base layer i4i can be contacted with the molding die 152 to achieve hot press forming, in fact, different molding. The mold 152 is designed to have its relative position inverted. For example, the molding die 152 is disposed under the film 153 and the gas is forced downward. That is, in the thin press forming step (9), the surface in contact with the molding die 152 may be the surface of the film 153 or the surface of the underlying layer 141 as shown in the first drawing. /Continue, please refer to Figures 6 and 8, after the film hot press forming step 15〇, the plastic injection step 16〇 is performed. These printing steps pass the shell film 151 through a plastic molding die (6) such that a casing fill layer 162 is formed on the base layer 141. The resulting finished product comprises a plurality of connected keycaps (6). As shown in FIG. 6, the hot-formed shell-shaped film 151 is removed from the molding die 152, and placed on a plastic molding die ΐ6 to perform a plastic injection molding of the thin shell to make the underlying layer 141. Forming a shell fill layer/162° shell fill layer 162 in addition to the surface-formed shell of the film 153 additionally complements the problem of insufficient film formation of the film 153 during the film thermoforming step 15〇. For example, although the thin forming step 15G can impart a specific shape to the film 153, if the shape is contracted by the temperature, or is contracted by the physical property of the material itself, the plastic injection step 16〇 The formation pressure of the film 153 can be increased by the filling pressure at the time of ejection. The body filling layer 161 is a base support 7C located below the illuminating keycap housing 162 (basie supp (ming). The housing filling layer (6) is a solid support member generally containing a filling material For example, 10 201223733 The shell filling layer 161 comprises a polymer, for example, the polymer may be a rigid plastic and at least soft. The hard plastic may be an engineering plastic or the like, and the soft silicone may be a silicone rubber. The size of the casing filling layer 161 can be adjusted depending on the application. For example, in the mobile device, the casing filling layer 161 can be small in size and can be planar to form a multi-layer stacked keyboard input. The device meets the general requirements of “light, thin, short, and small.” On the other hand, when applied to a larger desktop device, the size of the φ body filling layer U0 can be slightly larger and can be a three-dimensional structure. The multi-layer stacking in the figure is for the convenience of the user. Please refer to Figure 7 and Figure 8. After the plastic injection step 16〇, the punching step 17 can be performed as needed. For example, the film 153 having the casing filling layer is removed from the plastic molding die 161, and punching is performed at a predetermined position, that is, a plurality of keycap housings 163 are formed. As shown in Fig. 7, the die cutting method is This can be achieved by means of a die-cutting die 171, or as shown in FIG. 7A, using a laser beam 172 for the cut-off, and directly processing the joint position between the keycap housing 163 and the keycap housing 163 ( That is, no plastic is injected out of the thin shell, so that the keycap housing 163 becomes an independent component for subsequent processing. As can be seen from Fig. 7/7A, since the protective layer 110 is permeable to light, the user The symbol 132 in the symbol layer can be directly viewed from the outside of the keycap housing 162. And because of the illumination of the light-emitting layer 121, the user can clearly distinguish the symbol layer in the keycap housing 163 even under low illumination conditions. The letter, symbol or figure indicated by the symbol 132. 11 201223733 Fig. 8 is a flow chart showing the method of making the key cap of the present invention as shown in Fig. 8. Fig. 9 is a flow chart showing another method of making the key cap of the present invention. Depending on the situation, 'printing in the color of the table After step 111, a symbol color printing step 113 or a symbol multi-color printing step 114 may be included. As shown in Fig. 9, the different symbols 132 may be rendered in a plurality of different colors. The symbol multicolor printing step 114 is repeated at least once. The above is only a preferred embodiment of the present invention, and all variations and modifications made by the scope of the present invention should be within the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a protective layer capable of transmitting light. Fig. 2 is a view showing a step of printing a light emitting layer. Figs. 3 and 3A show a step of performing a symbol layer printing. Figure 4 illustrates the step of performing a background color printing. Figure 5 illustrates the steps of performing a film hot press forming process. 5A and 5B illustrate a method of hot press forming. Figure 6 shows the plastic injection step. Figure 7 illustrates the use of a die cutting die to achieve the punching step. Figure 7A depicts the use of laser light to achieve the blanking step. Figure 8 is a flow chart showing the method of making the key cap of the present invention. Figure 9 is another flow chart showing the method of making the key cap of the present invention. [Main component symbol description] 12 201223733 102 baking device 110 protective layer 111 color printing step 112 color layer 113 symbol color printing step 114 symbol multicolor printing step 120 light emitting layer printing step 121 light emitting layer 130 symbol layer printing step 131 symbol Layer 132 symbol 140 background color printing step 141 background layer 150 film hot pressing step 151 shell film • 152 forming mold 153 film 154 male mold 155 female mold 160 plastic injection step 161 plastic molding mold 162 shell filling layer 163 key cap 201223733 170 punching step 171 punching die 172 laser light
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