TWI846986B - 板狀物保持具 - Google Patents
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Abstract
[課題]提供一種可以確實地吸引保持具有凹凸或波紋之晶圓等的板狀物之板狀物保持具。
[解決手段]一種板狀物保持具,包含:保持基台,具有連結於吸引源之連結口、與保持面;第一O形環,配設於保持面;第二O形環,配設於第一O形環的內側;吸引孔,在第一O形環與第二O形環之間開口且連通於連結口;及液體供給機構,在第一O形環的外周於保持面與板狀物之間形成液體密封。
Description
本發明是有關於一種吸引保持晶圓等板狀物之板狀物保持具。
將IC、LSI等的複數個器件以交叉的複數條分割預定線來區劃而形成在正面之晶圓,是藉由切割裝置、雷射加工裝置而被分割成一個個的器件晶片,並且可將已分割的各器件晶片應用在行動電話、個人電腦等的電氣機器上。
形成有器件之晶圓,可藉由以線鋸、雷射加工裝置來對矽晶錠、SiC晶錠等之晶錠進行切片而生成。已從晶錠切片出之晶圓的正面及背面可藉由磨削及研磨來加工成鏡面(參照例如專利文獻1及2)。
專利文獻1:日本特開2000-94221號公報
專利文獻2:日本特開2016-111143號公報
但是,在已從晶錠切片出之晶圓上會有凹凸或波紋,在藉由具有吸引保持晶圓之保持面的保持具來搬送晶圓時,會導致在晶圓與保持面之間形成有間隙,而有以下問題:因外部空氣從此間隙流入而使晶圓從保持具的保持面掉落。
因此,本發明之目的在於提供一種可以確實地吸引保持具有凹凸或波紋之晶圓等的板狀物之板狀物保持具。
根據本發明,可提供一種吸引保持板狀物之板狀物保持具,前述板狀物保持具具備有:保持基台,具有連結於吸引源的連結口、與保持面;第一O形環,配設於該保持面;第二O形環,配設於該第一O形環的內側;吸引孔,在該第一O形環與該第二O形環之間開口且連通於該連結口;及液體供給機構,在該第一O形環的外周於該保持面與板狀物之間形成液體密封。
根據本發明,即使在第一及第二O形環與板狀物之間形成有間隙的情況下,因為以液體將第一O形環的外周密封,所以可抑制外部氣體從第一及第二O形環與晶圓的間隙流入之情形,而可以確實地吸引保持具有凹凸或波紋之晶圓等的板狀物。
2:板狀物保持具
4:保持基台
6:移動機構
8:主部
10:圓筒部
12:防脫片(圓形狀防脫片)
14:連結口
16,22,42:流路
18:吸引源
20:噴射器
20a:小徑部
24:氣體供給源
26,46:閥
28:第一O形環
30:第二O形環
32:吸引孔
34:液體供給機構
36:第一環狀溝
38:第二環狀溝
40:環狀構件
40a:噴出孔
40b:供給口
44:液體供給源
48:臂
50:旋轉軸
52:貫通開口
54:凹處
56:線圈彈簧
60:磨削裝置
62a:第一片匣
62b:第二片匣
64a:第一片匣載置部
64b:第二片匣載置部
66:搬出入組件
68:暫置組件
70:工作夾台
72:磨削組件
74:洗淨組件
76:基台
S:液體密封
W:晶圓
圖1是本發明實施形態之板狀物保持具的立體圖。
圖2是圖1所示之板狀物保持具的截面圖。
圖3是從下方觀看圖1所示之保持基台的立體圖。
圖4是顯示以圖1所示之板狀物保持具保持有板狀物之狀態的截面圖。
圖5是具備有圖1所示之板狀物保持具的磨削裝置的立體圖。
以下,一面參照圖式一面說明本發明實施形態之板狀物保持具。
參照圖1及圖2來說明,整體以符號2表示之板狀物保持具具備保持
基台4與移動機構6,前述保持基台4具有連結於吸引源之連結口,並且具備有保持面,前述移動機構6是移動保持基台4。如圖2所示,保持基台4包含圓板狀的主部8、從主部8的上表面中央部朝上方延伸的圓筒部10、及固定於圓筒部10之上端且直徑比圓筒部10更大之圓形狀防脫片12。於圓筒部10附設有朝徑方向外側突出之圓筒狀的連結口14,此連結口14是透過流路16而連結於吸引源18。
如圖2所示,本實施形態之吸引源18作為整體而具有圓筒狀的噴射器20、透過流路22而連結於噴射器20且對噴射器20供給氣體之氣體供給源24、及將流路22打開關閉之閥26。在噴射器20的軸方向中間部,設置有內徑比其他部分更小的小徑部20a。在此小徑部20a連接有延伸到保持基台4的連結口14的流路16,在噴射器20之軸方向一端部則連接有延伸至氣體供給源24的流路22。
並且,在吸引源18中形成為:若以已將閥26打開的狀態來作動氣體供給源24,並透過流路22從氣體供給源24將高壓氣體供給至噴射器20時,小徑部20a的壓力會降低,藉此在小徑部20a產生負壓而從流路16吸引空氣。再者,關於吸引源18,雖然亦可由吸引泵來構成,但因為吸引源18有時會將後述之液體供給機構34的液體吸入,所以較佳的是包含可從噴射器20的軸方向另一端部將液體和高壓氣體一起排出的上述之噴射器20的構成。
參照圖2及圖3來進行說明,板狀物保持具2更具備:第一O形環28,配設於構成保持面的主部8之下表面;第二O形環30,配設於第一O形環28的內側;吸引孔32,在第一O形環28與第二O形環30之間開口並連通於連結口14;及液體供給機構34,在第一O形環28的外周於保持面與板狀物之間形成液體密封。
第一O形環28及第二O形環30都是由合成橡膠等之可彈性變形的合宜的材料所形成,且第二O形環30的直徑比第一O形環28的直徑更小。如圖2所示,在主部8的下表面形成有第一環狀溝36、及配置在第一環狀溝36的內側且
直徑比第一環狀溝36更小的第二環狀溝38。並且,在第一環狀溝36配設有第一O形環28,且在第二環狀溝38配設有第二O形環30。
如圖2及圖3所示,在主部8的下表面開口的吸引孔32,是在第一O形環28與第二O形環30之間於主部8的圓周方向上隔著間隔而形成有複數個(在本實施形態中為4個)。如藉由參照圖2而可理解地,各吸引孔32是連通於圓筒部10的內部及連結口14。
並且,在板狀物保持具2中是形成為:藉由使吸引源18作動,並在吸引孔32生成吸引力,而以主部8之下表面吸引保持晶圓等的板狀物。像這樣而構成有使保持基台4的主部8的下表面保持板狀物的保持面。又,在主部8之下表面吸引保持板狀物時,是使第一及第二O形環28、30的每一個的下端接觸於板狀物的上表面,且在主部8的下表面與板狀物的上表面之間存在間隙(參照圖4)。
如圖2及圖3所示,液體供給機構34包含固定於保持基台4的主部8的外周之環狀構件40。在此環狀構件40中,在圓周方向上隔著間隔而形成有複數個開口於下表面的噴出孔40a,並且設置有連通於複數個噴出孔40a之供給口40b(參照圖1及圖2)。如圖2所示,液體供給機構34更包含透過流路42而連結於供給口40b之液體供給源44、及將流路42打開關閉之閥46。
並且,如圖4所示,在液體供給機構34中是形成為:在以保持基台4的主部8的下表面(保持面)吸引保持有板狀物的狀態下,讓可藉由打開閥46而從液體供給源44透過流路42供給至供給口40b的水等之液體從複數個噴出孔40a噴出,而在第一O形環28的外周於保持基台4的下表面(保持面)與晶圓W等的板狀物的上表面之間形成環狀的液體密封S。再者,在本實施形態之板狀物保持具2中,雖然是從個別的構件來構成保持基台4的主部8與液體供給機構34的環狀構件40,但亦可從單一的共通構件來構成主部8與環狀構件40。
參照圖1及圖2來說明移動機構6。如圖1所示,移動機構6具有連結
於保持基台4之實質上從一端部水平地延伸之臂48、固定在臂48的另一端部且在上下方向上延伸之旋轉軸50、以在上下方向上延伸的軸線為中心來使旋轉軸50旋轉的馬達(未圖示)、及使旋轉軸50升降的電動汽缸等之升降組件(未圖示)。
如圖2所示,在臂48的一端部形成有在上下方向上延伸的貫通開口52,且在貫通開口52插入有保持基台4的圓筒部10。在貫通開口52的上端側周緣形成有直徑比貫通開口52更大的凹處54。在此凹處54定位有保持基台4的防脫片12,藉此形成為保持基台4不會從臂48脫落。
如藉由參照圖2而可理解地,於臂48的一端部的下表面與保持基台4的主部8的上表面之間附設有線圈彈簧56。將保持基台4的下表面定位在板狀物之上表面時,由於保持基台4會隨著壓縮線圈彈簧56而上升,因此可緩和從保持基台4的下表面作用於板狀物的衝擊,並且使保持基台4的下表面與晶圓W等的板狀物的吸附面之配合變得良好。
參照圖4,針對使用如上述之板狀物保持具2來搬送作為板狀物之圓板狀的晶圓W之搬送方法進行說明。
在使用板狀物保持具2之搬送方法中,首先,是藉由以馬達使旋轉軸50合宜旋轉並且以升降組件使其合宜升降,而將保持基台4的主部8的下表面(保持面)定位在已放置在合宜的工作台(未圖示)之晶圓W的上方。接著,以升降組件使旋轉軸50下降,而使保持基台4的第一及第二O形環28、30密合於晶圓W的上表面。
接著,在已將流路22之閥26打開的狀態下作動氣體供給源24並藉由吸引源18的作用而在保持基台4的吸引孔32生成吸引力,且以保持基台4的主部8的下表面來吸引保持晶圓W的上表面。接著,如圖4所示,將流路42之閥46打開讓水等之液體從噴出孔40a噴出,而在第一O形環28的外周於主部8的下表面與晶圓W的上表面之間形成環狀的液體密封S。
接著,藉由以馬達使旋轉軸50合宜旋轉並且以升降組件使其合宜升降,來搬送已被保持基台4保持之晶圓W,並使晶圓W的下表面接觸於用來載置晶圓W之合宜的工作台(未圖示)的上表面。然後,停止吸引源18的作動並解除由保持基台4所進行之晶圓W的吸引保持,且將晶圓W載置於工作台的上表面。如此進行而以板狀物保持具2來搬送晶圓W。
如以上所述,在本實施形態之板狀物保持具2中,即使是在第一及第二O形環28、30的下端與晶圓W的上表面之間形成有間隙的情況下,因為可將第一O形環28的外周以液體密封,所以可抑制外部空氣從第一及第二O形環28、30與晶圓W之間的間隙流入之情形,而可以確實地吸引保持具有凹凸或波紋的晶圓W。
再者,上述之板狀物保持具2可裝設在例如圖5所示之磨削裝置60。磨削裝置60具備有:第一片匣載置部64a,可載置第一片匣62a,前述第一片匣62a容置有磨削加工前之複數個晶圓W;第二片匣載置部64b,可載置第二片匣62b,前述第二片匣62b可容置磨削加工後之複數個晶圓W;搬出入組件66,從第一片匣62a搬出磨削加工前之晶圓W,並且將磨削加工後之晶圓W搬入第二片匣62b;暫置組件68,供藉由搬出入組件66所搬出之磨削加工前的晶圓W暫置;第一搬送組件,將已暫置於暫置組件68之磨削加工前的晶圓W搬送到工作夾台70;磨削組件72,對已保持於工作夾台70之晶圓W的上表面進行磨削;及第二搬送組件,將磨削加工後的晶圓W從工作夾台70搬出並搬送到洗淨組件74,上述第一及第二搬送組件可由上述之板狀物保持具2來構成。
在圖5所示的例子中,是將板狀物保持具2之移動機構6的旋轉軸50的下端旋轉自如地裝設於磨削裝置60之基台76上。因為第一搬送組件所搬送之晶圓W是磨削加工前之晶圓W,所以會有具有凹凸或波紋的情況,如上述,由於在板狀物保持具2中,即使是具有凹凸或波紋的晶圓W也可以確實地吸引保持,
因此不會有在搬送晶圓W時晶圓W掉落之情形。
2:板狀物保持具
4:保持基台
6:移動機構
8:主部
10:圓筒部
12:防脫片
14:連結口
16,22,42:流路
18:吸引源
20:噴射器
20a:小徑部
24:氣體供給源
26,46:閥
28:第一O形環
30:第二O形環
32:吸引孔
34:液體供給機構
36:第一環狀溝
38:第二環狀溝
40:環狀構件
40a:噴出孔
40b:供給口
44:液體供給源
48:臂
52:貫通開口
54:凹處
56:線圈彈簧
S:液體密封
W:晶圓
Claims (1)
- 一種板狀物保持具,可吸引保持板狀物,前述板狀物保持具具備有: 保持基台,具有連結於吸引源的連結口、與保持面; 第一O形環,配設於該保持面; 第二O形環,配設於該第一O形環的內側; 吸引孔,在該第一O形環與該第二O形環之間開口且連通於該連結口;及 液體供給機構,在該第一O形環的外周於該保持面與該板狀物之間形成液體密封。
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