MOUNTING HEAD
20200051947 · 2020-02-13
Assignee
Inventors
Cpc classification
B23K3/087
PERFORMING OPERATIONS; TRANSPORTING
H01L2224/73204
ELECTRICITY
H01L2224/13101
ELECTRICITY
H01L2924/00012
ELECTRICITY
H01L2924/00014
ELECTRICITY
H01L24/75
ELECTRICITY
H01L25/50
ELECTRICITY
H01L2224/73204
ELECTRICITY
H01L2924/00014
ELECTRICITY
H01L2224/751
ELECTRICITY
H01L2924/00012
ELECTRICITY
H01L2224/2919
ELECTRICITY
H01L2224/75
ELECTRICITY
H01L2224/73104
ELECTRICITY
H01L2224/8385
ELECTRICITY
H01L2224/2919
ELECTRICITY
H01L2224/83191
ELECTRICITY
H01L2224/8385
ELECTRICITY
H01L2224/75252
ELECTRICITY
H01L2224/13101
ELECTRICITY
B23K1/0016
PERFORMING OPERATIONS; TRANSPORTING
H01L2224/75745
ELECTRICITY
H01L24/73
ELECTRICITY
International classification
Abstract
A mounting apparatus is equipped with: an attachment including a surface for attaching a semiconductor die; a heater which is disposed on a side of the attachment opposite to the surface and heats the semiconductor die attached to the surface; a suction hole which penetrates through the attachment and the heater integrally and opens in the surface; and a body portion which is disposed on a side of the heater opposite to the attachment and on which a vacuum suction path in communication with the suction hole is arranged. The vacuum suction path includes a storage portion which stores a foreign matter consisting of a liquid formed by condensation of a gas suctioned from the suction hole or a solid formed by solidification of the liquid.
Claims
1. A mounting head, which is used in an electronic component mounting apparatus that bonds electrodes of a semiconductor die and a substrate or electrodes of another semiconductor die, the mounting head comprising: an attachment, which has an attachment surface for attaching the semiconductor die; a bonding heater, which is disposed on a surface of the attachment opposite to the attachment surface and heats the attachment and the semiconductor die; a body portion, which holds the bonding heater on an end surface; a first opening portion, which is formed on the attachment surface of the attachment; a second opening portion, which is formed on a surface different from the end surface of the body portion; a suction path, which has a first bending portion for bending a flowing path of a gas suctioned from the first opening portion in the body portion and penetrates through the inside of the attachment, the bonding heater, and the body portion, and which discharges the gas suctioned from the first opening portion to the outside in the second opening portion; and a dripping prevention portion, which is formed in the suction path and inhibits droplets formed by condensation of the gas from dripping to the bonding heater.
2. The mounting head according to claim 1, wherein the dripping prevention portion comprises a storage portion, which is disposed on a downstream side of the first bending portion in the suction path in a suction direction of the gas and stores the droplets formed by condensation of the gas or a solid formed by solidification of the droplets.
3. The mounting head according to claim 1, wherein the dripping prevention portion comprises a path heater, which is disposed directly above a penetration hole penetrating through the bonding heater in the suction path and heats the gas to a temperature higher than a condensation temperature of the gas.
4. The mounting head according to claim 1, wherein the dripping prevention portion comprises a cooling portion, which is disposed on a downstream side of the first bending portion in the suction path in a suction direction of the gas and cools the gas to a temperature lower than a condensation temperature of the gas.
5. The mounting head according to claim 1, wherein the dripping prevention portion comprises a condensation portion, which is disposed on a downstream side of the first bending portion in the suction path in a suction direction of the gas and increases fluid resistance of the gas.
6. The mounting head according to claim 1, wherein the suction path further comprises a second bending portion, which is arranged on a downstream side of the first bending portion in a suction direction of the gas; and the dripping prevention portion is arranged over the first bending portion and the second bending portion.
7. The mounting head according to claim 6, wherein the storage portion which stores the droplets formed by condensation of the gas or a solid formed by solidification of the droplets is disposed in the second bending portion.
8. The mounting head according to claim 1, wherein the body portion is configured to be divisible into upper and lower in a division face passing through the storage portion which stores the droplets formed by condensation of the gas or a solid formed by solidification of the droplets.
9. The mounting head according to claim 8, wherein a bottom of the storage portion is arranged in a lower body portion which is formed by division of the division face.
10. The mounting head according to claim 8, wherein the body portion comprises a third opening portion in an upper body portion which is formed by division of the division face; and the third opening portion is formed into a tapered shape so as to become smaller gradually toward the downstream side in a suction direction of the gas, and the diameter of one end surface of the third opening portion is larger than the diameter of the other end surface of the third opening portion on the downstream side in the suction direction.
11. The mounting head according to claim 1, wherein the body portion sequentially comprises, along a suction direction of the gas, a path heater which is disposed directly above a penetration hole penetrating through the bonding heater in the suction path and heats the gas to a temperature higher than a condensation temperature of the gas, a storage portion which is disposed on a downstream side of the first bending portion in the suction path in the suction direction of the gas and stores droplets formed by condensation of the gas or a solid formed by solidification of the droplets, and a cooling portion which is disposed on the downstream side of the first bending portion in the suction path in the suction direction of the gas and cools the gas to a temperature lower than the condensation temperature of the gas.
12. The mounting head according to claim 1, wherein the body portion further comprises, in the suction path, a projection portion at a position facing the position where a storage portion which stores droplets formed by condensation of the gas or a solid formed by solidification of the droplets is arranged.
13. The mounting head according to claim 1, wherein the bonding heater and the body portion comprises materials having different thermal conductivities.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0022]
[0023]
[0024]
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[0038]
DESCRIPTION OF THE EMBODIMENTS
[0039] An embodiment of the present invention is described below with reference to drawings. However, the embodiment described below is only illustrative, and there is no intention to exclude various alterations or technique applications unspecified below. That is, various alterations can be made to implement the present invention without departing from the scope of spirit thereof. In addition, in the description of a series of drawings, identical or similar portions are denoted by identical or similar symbols.
[0040] A flip-chip bonding apparatus (an electronic component mounting apparatus) of the embodiment of the present invention is described with reference to
[0041] The mounting head 60 illustratively includes: an attachment 10, which has a surface 14 (an attachment surface) for attaching a semiconductor die 70 by vacuum; a bonding heater 20, which is disposed on an upper surface 18 on the opposite side of the surface 14 of the attachment 10 and heats the attachment 10 and the semiconductor die 70 attached to the surface 14; a body portion 31 which holds the bonding heater 20 on a lower surface 33 (an end surface); a first opening portion 19 which is formed on the surface 14 of the attachment 10; a second opening portion 35, which is formed on a surface different from the lower surface 33 of the body portion 31; a suction path, which has a first bending portion 37 for bending a flowing path of the gas suctioned from the first opening portion 19 in the body portion 31 and is used as a penetration hole penetrating through the inside of the attachment 10, the bonding heater 20, and the body portion 31, and which discharges the gas suctioned from the first opening portion 19 to the outside in the second opening portion 35 (for example, a suction path including a vacuum suction hole 16 formed in the attachment 10, a vacuum suction hole 22 formed in the bonding heater 20, and a vacuum suction path 32 formed in the body portion 31); and a dripping prevention portion 90, which is formed in the suction path and inhibits droplets formed by condensation of gas from dripping to the bonding heater 20. The body portion 31 is connected to a driving apparatus not shown.
[0042]
[0043] 2A-2C, the attachment 10 illustratively includes a square-plate-shaped base 11, and an island 13 which protrudes in a square pedestal shape from the lower surface 12 of the base 11 and attaches the semiconductor die 70 shown in
[0044] Back to
[0045]
[0046] Back to
[0047] The vacuum suction path 32 arranged in the body portion 31 is connected via the second opening portion 35 to a vacuum pump 44 by a pipe 41 which is equipped with a solenoid valve 43 in the middle. When the vacuum pump 44 is driven, the vacuum suction path 32 to which the pipe 41 is connected and the vacuum suction hole 22 of the bonding heater 20 are in a vacuum state, and the attachment 10 is attached in vacuum to a lower surface 26 of the bonding heater 20. In addition, when the solenoid valve 43 is open, the vacuum suction path 32 of the body portion 31 to which the pipe 41 is connected, the vacuum suction hole 22 of the bonding heater 20 in communication with the vacuum suction path 32, and the vacuum suction hole 16 of the attachment 10 in communication with the vacuum suction hole 22 are in a vacuum state. Thus, a surface of the semiconductor die 70 on a protruding electrode 72 side is attached in vacuum to the surface 14 of the island 13 of the attachment 10.
[0048]
[0049]
[0050]
[0051] In
[0052] Besides, the dripping prevention portion 90 may include, in place of the cooling portion 90C, a condensation portion which is disposed on the downstream side of the first bending portion 37 in the vacuum suction path 32 in the suction direction of the gas and increases fluid resistance of the gas. In addition, the dripping prevention portion 90 may further include the condensation portion in addition to the cooling portion 90C. The cooling portion 90C and the condensation portion can promote condensation of the gas, and the liquefied gas is stored in the storage portion 90A.
[0053] With reference to
[0054]
[0055] Next, the mounting head 60 is moved onto the semiconductor die 70 which is placed on an unillustrated inversion and delivery apparatus of the semiconductor 70 in a manner that the protruding electrodes 72 are on the upper side. Then, the solenoid valve 43 is opened, and the vacuum suction path 32 of the body portion 31 to which the pipe 41 is connected, the vacuum suction hole 22 of the bonding heater 20 in communication with the vacuum suction path 32, and the vacuum suction hole 16 of the attachment 10 in communication with the vacuum suction hole 22 are in a vacuum state. Thus, the surface of the semiconductor die 70 on the protruding electrode 72 side is attached in vacuum to the surface 14 of the island 13 of the attachment 10.
[0056] After that, when the mounting head 60 is moved in a manner that the position of the semiconductor die 70 fits with the position of the semiconductor die 80 disposed on the bonding stage 50, the flip-chip bonding apparatus 100 is in the state shown in
[0057] As shown in
[0058]
[0059] Then, the NCF 75 pasted to a side of the semiconductor die 70 on which the protruding electrodes 73 is disposed is low in viscosity and fills the gap between the die body 81 of the semiconductor die 80 and the die body 71 of the semiconductor die 70. After that, the protruding electrodes 82 of the semiconductor die 80 and the protruding electrodes 73 of the semiconductor die 70 are metallically bonded by the molten bumps 74, and the resin filling the gap between the die body 81 of the semiconductor die 80 and the die body 71 of the semiconductor die 70 is thermally cured to a thermoset resin 75a.
[0060] At this time, the gasified components of the NCF 75 become a gas G and remain around the semiconductor die 70. There is a concern that the remaining gas flows, as shown by the arrow A1, into the vacuum suction hole 16 of the attachment 10, the vacuum suction hole 22 of the bonding heater 20, and the vacuum suction path 32 of the body portion 31. However, the gas G flowing into these places is heated, for example, by the path heater 90B arranged in the vacuum suction path 32, and directly rises into the vacuum suction path 32 without liquefying on the way to rise into the vacuum suction path 32 (for example, a range surrounded by a dotted line C in the vacuum suction path 32). The rising gas G is cooled by the cooling portion 90C arranged in the vacuum suction path 32 and thereby liquefies (condenses). Then, droplets L drip from the cooling portion 90C and is stored in the storage portion 90A arranged in the vacuum suction path 32 as a stored article 91, or a solid formed by solidification of the liquid is stored in the storage portion 90A as the stored article 91.
[0061]
[0062] As shown in
[0063]
[0064]
[0065] XII-XII. As shown in
[0066]
[0067] As described above, the vacuum suction path 32 arranged in the body portion 31 includes the dripping prevention portion 90. Thus, even if the gas flowing into the vacuum suction path 32 condenses, a liquid and a solid formed by solidification of the liquid can be prevented from dripping to the bonding heater 20. Therefore, the resin containing the gas components can be prevented from sealing the vacuum suction hole 22, and thus fouling of the mounting head 60 can be inhibited.
OTHER EMBODIMENTS
[0068] The present invention is described above according to the embodiment, but the description and the drawings that constitute a part of this disclosure should not be construed as limiting this invention. Alternative embodiments, examples and application techniques should be apparent to those skilled in the art from this disclosure.
[0069] In the above-described embodiment, the vacuum suction holes 16, 22 and the vacuum suction path 32 are described as an elongated round shape, but the shape of the vacuum suction hole is not limited hereto and the vacuum suction hole may be configured, for example, by a rectangular hole or an elliptical hole.
[0070] In addition, an example in which the NCF 75 is used in the bonding between the semiconductor die 70 and the semiconductor die 80 is described, but the present invention is not limited hereto, and other types of resins can also be used.
DESCRIPTION OF THE SYMBOLS
[0071] 10 attachment [0072] 11 base [0073] 12, 26, 33 lower surface [0074] 13 island [0075] 14 surface [0076] 16, 22 vacuum suction hole [0077] 18, 27 upper surface [0078] 19 first opening portion [0079] 20 bonding heater [0080] 31 body portion [0081] 32 vacuum suction path [0082] 35 second opening portion [0083] 36 third opening portion [0084] 37 first bending portion [0085] 38 second bending portion [0086] 39 third bending portion [0087] 41 pipe [0088] 43 solenoid valve [0089] 44 vacuum pump [0090] 50 bonding stage [0091] 60 mounting head [0092] 70, 80 semiconductor die [0093] 71, 81 die body [0094] 72, 73, 82 protruding electrode [0095] 74 bump [0096] 74b bonding metal [0097] 75 non-conductive film (NCF) [0098] 75a thermoset resin [0099] 75c filling resin [0100] 90 dripping prevention portion [0101] 90A storage portion [0102] 90B path heater [0103] 90, 90C cooling portion [0104] 90D projection portion [0105] 91 storage [0106] 95 bottom [0107] 100 flip-chip bonding apparatus