US20140317919A1 - Method of manufacturing printed circuit board - Google Patents
Method of manufacturing printed circuit board Download PDFInfo
- Publication number
- US20140317919A1 US20140317919A1 US14/323,728 US201414323728A US2014317919A1 US 20140317919 A1 US20140317919 A1 US 20140317919A1 US 201414323728 A US201414323728 A US 201414323728A US 2014317919 A1 US2014317919 A1 US 2014317919A1
- Authority
- US
- United States
- Prior art keywords
- unit substrates
- solder balls
- circuit board
- printed circuit
- strip substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 184
- 238000000034 method Methods 0.000 claims abstract description 72
- 229910000679 solder Inorganic materials 0.000 claims abstract description 60
- 230000008569 process Effects 0.000 claims abstract description 53
- 230000004907 flux Effects 0.000 claims description 28
- 230000003247 decreasing effect Effects 0.000 description 8
- 238000007650 screen-printing Methods 0.000 description 8
- 229920006336 epoxy molding compound Polymers 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/48—Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the subgroups H01L21/06 - H01L21/326
- H01L21/4814—Conductive parts
- H01L21/4846—Leads on or in insulating or insulated substrates, e.g. metallisation
- H01L21/4853—Connection or disconnection of other leads to or from a metallisation, e.g. pins, wires, bumps
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3457—Solder materials or compositions; Methods of application thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/10—Bump connectors ; Manufacturing methods related thereto
- H01L24/11—Manufacturing methods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/11—Manufacturing methods
- H01L2224/11001—Involving a temporary auxiliary member not forming part of the manufacturing apparatus, e.g. removable or sacrificial coating, film or substrate
- H01L2224/11003—Involving a temporary auxiliary member not forming part of the manufacturing apparatus, e.g. removable or sacrificial coating, film or substrate for holding or transferring the bump preform
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/12—Structure, shape, material or disposition of the bump connectors prior to the connecting process
- H01L2224/13—Structure, shape, material or disposition of the bump connectors prior to the connecting process of an individual bump connector
- H01L2224/13001—Core members of the bump connector
- H01L2224/13099—Material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00013—Fully indexed content
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01005—Boron [B]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01006—Carbon [C]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01029—Copper [Cu]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01033—Arsenic [As]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01047—Silver [Ag]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/01—Chemical elements
- H01L2924/01082—Lead [Pb]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/013—Alloys
- H01L2924/014—Solder alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/35—Mechanical effects
- H01L2924/351—Thermal stress
- H01L2924/3511—Warping
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/04—Soldering or other types of metallurgic bonding
- H05K2203/0405—Solder foil, tape or wire
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0044—Mechanical working of the substrate, e.g. drilling or punching
- H05K3/0052—Depaneling, i.e. dividing a panel into circuit boards; Working of the edges of circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3457—Solder materials or compositions; Methods of application thereof
- H05K3/3478—Applying solder preforms; Transferring prefabricated solder patterns
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49128—Assembling formed circuit to base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49133—Assembling to base an electrical component, e.g., capacitor, etc. with component orienting
- Y10T29/49135—Assembling to base an electrical component, e.g., capacitor, etc. with component orienting and shaping, e.g., cutting or bending, etc.
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/4913—Assembling to base an electrical component, e.g., capacitor, etc.
- Y10T29/49139—Assembling to base an electrical component, e.g., capacitor, etc. by inserting component lead or terminal into base aperture
- Y10T29/4914—Assembling to base an electrical component, e.g., capacitor, etc. by inserting component lead or terminal into base aperture with deforming of lead or terminal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49147—Assembling terminal to base
- Y10T29/49149—Assembling terminal to base by metal fusion bonding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49169—Assembling electrical component directly to terminal or elongated conductor
Definitions
- the present invention relates to a method of manufacturing a printed circuit board.
- an electronic component-embedded substrate in which an electronic component is mounted and protected is being increasingly used.
- the substrate becomes thinner, there is a problem in that the supporting force of the substrate is decreased, and thus the warpage thereof is increased.
- an electronic component-embedded substrate is problematic in that, after it is encapsulated with an epoxy molding compound (EMC), it becomes warped because of the difference in the thermal expansion coefficient. Therefore, owing to the increase in the warpage of a substrate, it is difficult to accurately attach solder balls at the predetermined positions of the substrate.
- EMC epoxy molding compound
- FIGS. 1A to 1E are sectional views showing a conventional method of manufacturing a printed circuit board.
- conventional problems will be described with reference to FIGS. 1A to 1E .
- the strip substrate 1 may be an electronic component-embedded substrate on which an electronic component is encapsulated with an epoxy molding compound (EMC) 5 .
- EMC epoxy molding compound
- flux 2 is applied onto the strip substrate 1 .
- the strip substrate 1 is warped, there is a problem in that the flux 2 is not accurately applied at the predetermined positions of the strip substrate 1 .
- solder balls 3 are attached to the strip substrate 1 .
- the solder balls 3 are attached using a jig.
- the strip substrate 1 is warped, there is also a problem in that the solder balls 3 are not accurately attached at the predetermined positions of the strip substrate 1 , and collect at the specific parts of the strip substrate 1 .
- a reflow process and a singulation process are performed.
- the solder balls 3 are fixed through heat treatment, and, in this procedure, the strip substrate 1 is additionally warped. Therefore, since the solder balls 3 are not accurately attached at the predetermined positions of the strip substrate 1 and the strip substrate 1 becomes additionally warped through the reflow process, when the strip substrate 1 is separated into unit substrates 4 through the singulation process, there are problems in that the solder balls 3 are not accurately attached at the predetermined positions of each of the unit substrates 4 , and each of the unit substrates 4 is also considerably warped.
- the conventional method of manufacturing a printed circuit board is uneconomical because expensive equipment is required and equipment suitable for the strip substrate 1 must be provided whenever the kind of strip substrate 1 is changed.
- technologies for attaching solder balls using a screen printing process have been developed, these technologies are also difficult to be practically used when the strip substrate 1 is warped because the screen printing process premises that the strip substrate is flat.
- embodiments of the invention have been devised to solve the above-mentioned problems, and embodiments of the present invention provide a method of manufacturing a printed circuit board, in which solder balls are accurately formed at predetermined positions by attaching the solder balls after performing a singulation process.
- An embodiment of the invention provide a method of manufacturing a printed circuit board, including mounting a strip substrate on a fixing member, separating the strip substrate into unit substrates by performing a singulation process, attaching solder balls onto the unit substrates using a jig, and fixing the solder balls on the unit substrates by performing a reflow process.
- the fixing member is dicing tape.
- the method of manufacturing a printed circuit board further includes integrally mounting the unit substrates on a support plate before the attaching of the solder balls.
- the support plate fixes the unit substrates by vacuum-adsorbing the unit substrates.
- the method of manufacturing a printed circuit board further includes applying flux onto the unit substrates using a jig before the attaching of the solder balls.
- the method of manufacturing a printed circuit board further includes applying flux onto the solder balls before the attaching of the solder balls.
- the method of manufacturing a printed circuit board further includes mounting the unit substrates on a tray for reflow before the fixing of the solder balls.
- a method of manufacturing a printed circuit board including mounting a strip substrate on a fixing member, separating the strip substrate into unit substrates by performing a singulation process, attaching solder balls onto the unit substrates using a mask disposed on the unit substrates, and fixing the solder balls on the unit substrates by performing a reflow process.
- the fixing member is dicing tape.
- the method of manufacturing a printed circuit board further includes integrally mounting the unit substrates on a support plate before the attaching of the solder balls.
- the support plate fixes the unit substrates by vacuum-adsorbing the unit substrates.
- the method of manufacturing a printed circuit board further includes applying flux onto the unit substrates using a mask disposed on the unit substrates before the attaching of the solder balls.
- the method of manufacturing a printed circuit board further includes mounting the unit substrates on a tray for reflow before the fixing of the solder balls.
- FIGS. 1A to 1E are sectional views sequentially showing a conventional method of manufacturing a printed circuit board.
- FIGS. 2 , 3 , 4 A, 4 B, 5 , 6 A, and 6 B are sectional views sequentially showing a method of manufacturing a printed circuit board according to an embodiment of the invention.
- FIGS. 7 , 8 , 9 , 10 , 11 A, and 11 B are sectional views sequentially showing a method of manufacturing a printed circuit board according to another embodiment of the invention.
- FIGS. 2 , 3 , 4 A, 4 B, 5 , 6 A, and 6 B are sectional views sequentially showing a method of manufacturing a printed circuit board according to an embodiment of the invention.
- the method of manufacturing a printed circuit board includes the steps of (A) mounting a strip substrate 100 on a fixing member 110 , (B) separating the strip substrate 100 into unit substrates 200 through a singulation process, (C) attaching solder balls 130 onto the unit substrates 200 using a jig 140 , and (D) fixing the solder balls 130 on the unit substrates 200 through a reflow process.
- a strip substrate 100 is mounted on a fixing member 110 .
- the strip substrate 100 is present in a state of having been warped due to the difference in the thermal expansion coefficient between a substrate and an epoxy molding compound (EMC) 105 and the decrease in thickness of a printed circuit board. Since a singulation process must be performed later in order to stretch the warped strip substrate 100 , the strip substrate 100 is mounted on the fixing member 110 .
- the fixing member 110 is not particularly limited as long as it stably supports the strip substrate 100 during a singulation process.
- dicing tape is used as the fixing member 110 .
- the strip substrate 100 is separated into unit substrates 200 .
- the separation of the strip substrate 100 into the unit substrates 200 is performed by a general singulation process.
- the unit substrates 200 separated from the strip substrate 100 are maintained in a state in which they are integrally mounted on the fixing member 110 , such as dicing tape, as an example.
- the fixing member 110 such as dicing tape, as an example.
- the warpage of the strip substrate 100 is decreased.
- flux 150 and solder balls 130 are accurately attached at the predetermined positions of the strip substrate 100 .
- flux 150 is applied on the strip substrate 100 .
- flux 150 is a material which removes an oxide film from a substrate pad made of, for example, copper and chemically activates the substrate pad such that solder balls 130 easily attach to the substrate pad.
- the flux 150 is applied onto the pads of the unit substrates 200 , to which the solder balls are to be attached, using a jig 120 (refer to FIG. 4A ) or are directly applied onto the solder balls using the jig 120 (refer to FIG. 4B ).
- the flux 150 is applied onto the unit substrates 200 using the jig 120 , since the warpage of the strip substrate 100 was previously decreased through a singulation process, the flux 150 are accurately applied at the predetermined positions of the unit substrates 200 .
- this procedure does not have to be necessarily performed, and, particularly, in the case of a flux-free soldering process, this procedure may be omitted.
- solder balls 130 are attached onto the unit substrates 200 .
- the solder balls 130 serve to connect the unit substrates 200 with external circuits, such as a mother board and the like, and are attached onto the unit substrates 200 using a jig 140 .
- the solder balls 130 are temporarily attached onto the unit substrates 200 by the flux 150 , and are completely fixed on the unit substrates 200 by a reflow process later. Since the warpage of the strip substrate 100 is previously decreased through a singulation process, the solder balls 130 are accurately attached at the predetermined positions of the unit substrates 200 .
- the lead time is shortened by performing the step of applying the flux 150 onto the unit substrates 150 and the step of attaching the solder balls 130 onto the unit substrates 200 in a state in which the unit substrates 150 separated from the strip substrate 100 are integrally mounted on the fixing member 110 . Further, at the time of applying the flux 150 and attaching solder balls 150 , a support plate 160 is employed in order to provide bearing resistance to the unit substrates 200 .
- the support plate 160 fixes the unit substrates 200 by vacuum-adsorbing the unit substrates 200 through suction holes 165 , so that the residual warpage of the unit substrates 200 are further decreased and the movement of the unit substrates 200 is prevented, with the result that the flux 150 is accurately applied at the predetermined positions of the unit substrates 200 and the solder balls 130 is accurately attach at the predetermined positions thereof.
- the unit substrates 200 is mounted on the support plate 160 in a state in which they are integrally mounted on the fixing member 110 .
- the solder balls 130 are fixed on the unit substrates 200 by a reflow process.
- the reflow process is a process of solidifying the solder balls 130 by heating, melting and then cooling them.
- a heat-resistant tray 170 for reflow is employed.
- the unit substrates 200 are mounted on the tray 170 for reflow, and then the reflow process is performed.
- the unit substrates 200 are mounted on the tray 170 for reflow using an adsorption nozzle.
- the reflow process may be performed in a state in which the unit substrates 200 are mounted on the dicing tape without mounting them on the tray 170 for reflow.
- the method of manufacturing a printed circuit board is advantageous in that the solder balls 130 are accurately formed at the predetermined positions of the strip substrate 100 because they are attached to the unit substrates 200 after the warpage of the strip substrate 100 was reduced by a singulation process. Further, the method of manufacturing a printed circuit board, according to this embodiment, is advantageous in that the manufacturing cost of a printed circuit board are lowered because the jigs 120 and 140 used to apply the flux 150 or to attach the solder balls 130 are used in the same way as before.
- the method of manufacturing a printed circuit board is advantageous in that the lead time in this method does not differ from the lead time of the conventional method which is performed in a state in which the strip substrate 100 is not separated into the unit substrates 200 because this method is performed in a state in which the separated unit substrates 200 are integrally mounted on the fixing member 110 or the tray 170 for reflow.
- FIGS. 7 , 8 , 9 , 10 , 11 A, and 11 B are sectional views sequentially showing a method of manufacturing a printed circuit board according to another embodiment of the invention.
- the method of manufacturing a printed circuit board includes the steps of (A) mounting a strip substrate 100 on a fixing member 110 , (B) separating the strip substrate 100 into unit substrates 200 by a singulation process, (C) attaching solder balls 130 onto the unit substrates 200 using a mask 145 disposed on the unit substrates 200 , and (D) fixing the solder balls 130 on the unit substrates 200 by a reflow process.
- This embodiment greatly differs from the above-mentioned embodiment in a process of attaching solder balls. Therefore, the differences therebetween will be mainly described, and a redundant description thereof will be omitted.
- a strip substrate 100 is mounted on a fixing member 110 , and is then separated into unit substrates 200 .
- the strip substrate 100 is mounted on the fixing member, such as dicing tape, and then a singulation process is used to separate the strip substrate 100 into the unit substrates 200 in order to stretch the warped strip substrate 100 .
- flux 150 is applied on the unit substrates 200 .
- the flux 150 is applied on the unit substrates 200 using a screen printing process after a mask 125 is disposed on the unit substrates 200 . More specifically, the flux 150 is applied on the unit substrates 200 by disposing the mask 125 provided with openings 127 on one side of the unit substrates 200 and then pressing the flux 150 onto the unit substrates 200 through the openings 127 using a squeegee.
- a screen printing process based on the premise that a printed circuit board is flat can be performed because the warpage of a printed circuit board was decreased through a singulation process.
- this procedure may be omitted in the case of a flux-free soldering process.
- solder balls 130 are attached onto the unit substrates 200 .
- the solder balls 130 like the procedure of applying the flux 150 , are applied on the unit substrates 200 using a screen printing process after a mask 145 is disposed on the unit substrates 200 .
- the solder balls 130 are applied on the unit substrates 200 by disposing the mask 145 provided with openings 147 on one side of the unit substrates 200 and then pressing the solder balls 130 onto the unit substrates 200 through the openings 147 using a squeegee.
- the solder balls 130 are attached at predetermined positions of the unit substrates 200 because a singulation process is used to decrease the warpage of a printed circuit board.
- the lead time is shortened by performing the step of applying the flux 150 onto the unit substrates 150 and the step of attaching the solder balls 130 onto the unit substrates 200 in a state in which the unit substrates 150 separated from the strip substrate 100 are integrally mounted on the fixing member 110 .
- a support plate 160 is employed in order to provide bearing resistance to the unit substrates 200 .
- the support plate 160 fixes the unit substrates 200 by vacuum-adsorbing the unit substrates 200 through suction holes 165 , so that the residual warpage of the unit substrates 200 are further decreased and the movement of the unit substrates 200 is prevented, with the result that the flux 150 is accurately applied at the predetermined positions of the unit substrates 200 and the solder balls 130 are accurately attached at the predetermined positions thereof.
- the solder balls 130 are fixed on the unit substrates 200 by a reflow process.
- the reflow process is performed by mounting the unit substrates 200 on a heat-resistant tray 170 for reflow because the unit substrates 200 are heated to high temperature.
- the method of manufacturing a printed circuit board is advantageous in that a singulation process was previously performed to decrease the warpage of a printed circuit board, so that a screen printing process based on the premise that a printed circuit board is flat can be performed, thereby reducing the cost necessary for a high-priced apparatus, such as a flux dotting tool or the like.
- the method of manufacturing a printed circuit board is advantageous in that the solder balls are accurately formed at the predetermined positions of the strip substrate because they are attached to the unit substrates after the warpage of the strip substrate was reduced by a singulation process, and in that the additional warpage of the strip substrate occurring in a reflow process can be reduced because the reflow process is performed after the strip substrate is separated into unit substrates by performing the singulation process.
- the method of manufacturing a printed circuit board is advantageous in that solder balls are attached to unit substrates using a screen printing method because a singulation process reduces the warpage of a strip substrate, and in that the expenditures necessary for a high-priced apparatus, such as a flux dotting tool is reduced because the screen printing method is used.
- the method of manufacturing a printed circuit board is advantageous in that it can also be used in a wafer leveling process.
- Embodiments of the present invention may suitably comprise, consist or consist essentially of the elements disclosed and may be practiced in the absence of an element not disclosed. For example, it can be recognized by those skilled in the art that certain steps can be combined into a single step.
- the terms “left,” “right,” “front,” “back,” “top,” “bottom,” “over,” “under,” and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein.
- the term “coupled,” as used herein, is defined as directly or indirectly connected in an electrical or non-electrical manner.
- Objects described herein as being “adjacent to” each other may be in physical contact with each other, in close proximity to each other, or in the same general region or area as each other, as appropriate for the context in which the phrase is used. Occurrences of the phrase “according to an embodiment” herein do not necessarily all refer to the same embodiment.
- Ranges may be expressed herein as from about one particular value, and/or to about another particular value. When such a range is expressed, it is to be understood that another embodiment is from the one particular value and/or to the other particular value, along with all combinations within said range.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Embodiments of the invention provide a method of manufacturing a printed circuit board. The method includes the steps of mounting a strip substrate on a fixing member, and separating the strip substrate into unit substrates by performing a singulation process. The method further includes the steps of attaching solder balls onto the unit substrates using a mask disposed on the unit substrates, and fixing the solder balls on the unit substrates by performing a reflow process.
Description
- This application is a divisional application of and claims the benefit of and priority to U.S. patent application Ser. No. 12/730,128, entitled, “METHOD OF MANUFACTURING PRINTED CIRCUIT BOARD,” filed on Mar. 23, 2010, which claims priority under 35 U.S.C. §119 to Korean Patent Application No. KR 10-2009-0117251, entitled “FABRICATING METHOD OF PRINTED CIRCUIT BOARD,” filed on Nov. 30, 2009, which are hereby incorporated by reference in their entirety into this application.
- 1. Field of the Invention
- The present invention relates to a method of manufacturing a printed circuit board.
- 2. Description of the Related Art
- Since densification, thinness, miniaturization and electrical improvements are being demanded by semiconductor packages, a substrate is becoming thinner and an electronic component-embedded substrate in which an electronic component is mounted and protected is being increasingly used. However, as the substrate becomes thinner, there is a problem in that the supporting force of the substrate is decreased, and thus the warpage thereof is increased. In particular, an electronic component-embedded substrate is problematic in that, after it is encapsulated with an epoxy molding compound (EMC), it becomes warped because of the difference in the thermal expansion coefficient. Therefore, owing to the increase in the warpage of a substrate, it is difficult to accurately attach solder balls at the predetermined positions of the substrate.
-
FIGS. 1A to 1E are sectional views showing a conventional method of manufacturing a printed circuit board. Hereinafter, conventional problems will be described with reference toFIGS. 1A to 1E . - First, as shown in
FIG. 1A , astrip substrate 1 is provided. Here, thestrip substrate 1 may be an electronic component-embedded substrate on which an electronic component is encapsulated with an epoxy molding compound (EMC) 5. Thisstrip substrate 1 becomes warped because of the difference in thermal expansion coefficient between the substrate and theEMC 5. - Subsequently, as shown in
FIG. 1B ,flux 2 is applied onto thestrip substrate 1. Here, since thestrip substrate 1 is warped, there is a problem in that theflux 2 is not accurately applied at the predetermined positions of thestrip substrate 1. - Subsequently, as shown in
FIG. 1C ,solder balls 3 are attached to thestrip substrate 1. Here, thesolder balls 3 are attached using a jig. In this case, since thestrip substrate 1 is warped, there is also a problem in that thesolder balls 3 are not accurately attached at the predetermined positions of thestrip substrate 1, and collect at the specific parts of thestrip substrate 1. - Subsequently, as shown in
FIGS. 1D and 1E , a reflow process and a singulation process are performed. In the reflow process, thesolder balls 3 are fixed through heat treatment, and, in this procedure, thestrip substrate 1 is additionally warped. Therefore, since thesolder balls 3 are not accurately attached at the predetermined positions of thestrip substrate 1 and thestrip substrate 1 becomes additionally warped through the reflow process, when thestrip substrate 1 is separated intounit substrates 4 through the singulation process, there are problems in that thesolder balls 3 are not accurately attached at the predetermined positions of each of theunit substrates 4, and each of theunit substrates 4 is also considerably warped. - Further, the conventional method of manufacturing a printed circuit board is uneconomical because expensive equipment is required and equipment suitable for the
strip substrate 1 must be provided whenever the kind ofstrip substrate 1 is changed. Although technologies for attaching solder balls using a screen printing process have been developed, these technologies are also difficult to be practically used when thestrip substrate 1 is warped because the screen printing process premises that the strip substrate is flat. - Therefore, various solutions for decreasing the warpage of the
strip substrate 1 have been proposed, but most of the solutions are problematic in that they require high production cost and are difficult to be put into practical use due to the change in the raw material and design of the substrate. - Accordingly, embodiments of the invention have been devised to solve the above-mentioned problems, and embodiments of the present invention provide a method of manufacturing a printed circuit board, in which solder balls are accurately formed at predetermined positions by attaching the solder balls after performing a singulation process.
- An embodiment of the invention provide a method of manufacturing a printed circuit board, including mounting a strip substrate on a fixing member, separating the strip substrate into unit substrates by performing a singulation process, attaching solder balls onto the unit substrates using a jig, and fixing the solder balls on the unit substrates by performing a reflow process.
- According to an embodiment, in the mounting of the strip substrate, the fixing member is dicing tape.
- According to an embodiment, the method of manufacturing a printed circuit board further includes integrally mounting the unit substrates on a support plate before the attaching of the solder balls.
- According to an embodiment, the support plate fixes the unit substrates by vacuum-adsorbing the unit substrates.
- According to an embodiment, the method of manufacturing a printed circuit board further includes applying flux onto the unit substrates using a jig before the attaching of the solder balls.
- According to an embodiment, the method of manufacturing a printed circuit board further includes applying flux onto the solder balls before the attaching of the solder balls.
- According to an embodiment, the method of manufacturing a printed circuit board further includes mounting the unit substrates on a tray for reflow before the fixing of the solder balls.
- According to another embodiment of the invention, there is provided a method of manufacturing a printed circuit board, including mounting a strip substrate on a fixing member, separating the strip substrate into unit substrates by performing a singulation process, attaching solder balls onto the unit substrates using a mask disposed on the unit substrates, and fixing the solder balls on the unit substrates by performing a reflow process.
- According to an embodiment, in the mounting of the strip substrate, the fixing member is dicing tape.
- According to an embodiment, the method of manufacturing a printed circuit board further includes integrally mounting the unit substrates on a support plate before the attaching of the solder balls.
- According to an embodiment, the support plate fixes the unit substrates by vacuum-adsorbing the unit substrates.
- According to an embodiment, the method of manufacturing a printed circuit board further includes applying flux onto the unit substrates using a mask disposed on the unit substrates before the attaching of the solder balls.
- According to an embodiment, the method of manufacturing a printed circuit board further includes mounting the unit substrates on a tray for reflow before the fixing of the solder balls.
- Various objects, advantages and features of the invention will become apparent from the following description of embodiments with reference to the accompanying drawings.
- These and other features, aspects, and advantages of the invention are better understood with regard to the following Detailed Description, appended Claims, and accompanying Figures. It is to be noted, however, that the Figures illustrate only various embodiments of the invention and are therefore not to be considered limiting of the invention's scope as it may include other effective embodiments as well.
-
FIGS. 1A to 1E are sectional views sequentially showing a conventional method of manufacturing a printed circuit board. -
FIGS. 2 , 3, 4A, 4B, 5, 6A, and 6B are sectional views sequentially showing a method of manufacturing a printed circuit board according to an embodiment of the invention. -
FIGS. 7 , 8, 9, 10, 11A, and 11B are sectional views sequentially showing a method of manufacturing a printed circuit board according to another embodiment of the invention. - Advantages and features of the present invention and methods of accomplishing the same will be apparent by referring to embodiments described below in detail in connection with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The embodiments are provided only for completing the disclosure of the present invention and for fully representing the scope of the present invention to those skilled in the art.
- For simplicity and clarity of illustration, the drawing figures illustrate the general manner of construction, and descriptions and details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the discussion of the described embodiments of the invention. Additionally, elements in the drawing figures are not necessarily drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help improve understanding of embodiments of the present invention. Like reference numerals refer to like elements throughout the specification.
- Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.
-
FIGS. 2 , 3, 4A, 4B, 5, 6A, and 6B are sectional views sequentially showing a method of manufacturing a printed circuit board according to an embodiment of the invention. - The method of manufacturing a printed circuit board, according to this embodiment, includes the steps of (A) mounting a
strip substrate 100 on a fixingmember 110, (B) separating thestrip substrate 100 intounit substrates 200 through a singulation process, (C) attachingsolder balls 130 onto theunit substrates 200 using ajig 140, and (D) fixing thesolder balls 130 on theunit substrates 200 through a reflow process. - First, as shown in
FIG. 2 , astrip substrate 100 is mounted on a fixingmember 110. Here, thestrip substrate 100 is present in a state of having been warped due to the difference in the thermal expansion coefficient between a substrate and an epoxy molding compound (EMC) 105 and the decrease in thickness of a printed circuit board. Since a singulation process must be performed later in order to stretch thewarped strip substrate 100, thestrip substrate 100 is mounted on the fixingmember 110. The fixingmember 110 is not particularly limited as long as it stably supports thestrip substrate 100 during a singulation process. Preferably, dicing tape is used as the fixingmember 110. - Subsequently, as shown in
FIG. 3 , thestrip substrate 100 is separated intounit substrates 200. The separation of thestrip substrate 100 into the unit substrates 200 is performed by a general singulation process. The unit substrates 200 separated from thestrip substrate 100 are maintained in a state in which they are integrally mounted on the fixingmember 110, such as dicing tape, as an example. In this procedure, since thestrip substrate 100 is separated into theunit substrates 200, the warpage of thestrip substrate 100 is decreased. Thus, in the following procedure,flux 150 andsolder balls 130 are accurately attached at the predetermined positions of thestrip substrate 100. - Subsequently, as shown in
FIGS. 4A and 4B ,flux 150 is applied on thestrip substrate 100. Here,flux 150 is a material which removes an oxide film from a substrate pad made of, for example, copper and chemically activates the substrate pad such thatsolder balls 130 easily attach to the substrate pad. Theflux 150 is applied onto the pads of theunit substrates 200, to which the solder balls are to be attached, using a jig 120 (refer toFIG. 4A ) or are directly applied onto the solder balls using the jig 120 (refer toFIG. 4B ). Meanwhile, when theflux 150 is applied onto theunit substrates 200 using thejig 120, since the warpage of thestrip substrate 100 was previously decreased through a singulation process, theflux 150 are accurately applied at the predetermined positions of the unit substrates 200. However, this procedure does not have to be necessarily performed, and, particularly, in the case of a flux-free soldering process, this procedure may be omitted. - Subsequently, as shown in
FIG. 5 ,solder balls 130 are attached onto the unit substrates 200. Here, thesolder balls 130 serve to connect theunit substrates 200 with external circuits, such as a mother board and the like, and are attached onto theunit substrates 200 using ajig 140. Further, thesolder balls 130 are temporarily attached onto theunit substrates 200 by theflux 150, and are completely fixed on theunit substrates 200 by a reflow process later. Since the warpage of thestrip substrate 100 is previously decreased through a singulation process, thesolder balls 130 are accurately attached at the predetermined positions of the unit substrates 200. - Meanwhile, the lead time is shortened by performing the step of applying the
flux 150 onto theunit substrates 150 and the step of attaching thesolder balls 130 onto theunit substrates 200 in a state in which theunit substrates 150 separated from thestrip substrate 100 are integrally mounted on the fixingmember 110. Further, at the time of applying theflux 150 and attachingsolder balls 150, asupport plate 160 is employed in order to provide bearing resistance to the unit substrates 200. Here, thesupport plate 160 fixes theunit substrates 200 by vacuum-adsorbing theunit substrates 200 throughsuction holes 165, so that the residual warpage of theunit substrates 200 are further decreased and the movement of the unit substrates 200 is prevented, with the result that theflux 150 is accurately applied at the predetermined positions of theunit substrates 200 and thesolder balls 130 is accurately attach at the predetermined positions thereof. Further, according to an embodiment, the unit substrates 200 is mounted on thesupport plate 160 in a state in which they are integrally mounted on the fixingmember 110. - Subsequently, as shown
FIGS. 6A and 6B , thesolder balls 130 are fixed on theunit substrates 200 by a reflow process. The reflow process is a process of solidifying thesolder balls 130 by heating, melting and then cooling them. In this case, since theunit substrates 200 are also heated to high temperature, a heat-resistant tray 170 for reflow is employed. Thus, after the dicing tape previously used as the fixingmember 110 is removed, theunit substrates 200 are mounted on thetray 170 for reflow, and then the reflow process is performed. The unit substrates 200 are mounted on thetray 170 for reflow using an adsorption nozzle. - However, when dicing tape having heat resistance is employed, the reflow process may be performed in a state in which the
unit substrates 200 are mounted on the dicing tape without mounting them on thetray 170 for reflow. - Meanwhile, in this embodiment, differently from conventional technologies, since the reflow process is performed in a state in which the
strip substrate 100 is separated into theunit substrates 200, the additional warpage of thestrip substrate 100 occurring in the reflow process is reduced. - The method of manufacturing a printed circuit board, according to this embodiment, is advantageous in that the
solder balls 130 are accurately formed at the predetermined positions of thestrip substrate 100 because they are attached to theunit substrates 200 after the warpage of thestrip substrate 100 was reduced by a singulation process. Further, the method of manufacturing a printed circuit board, according to this embodiment, is advantageous in that the manufacturing cost of a printed circuit board are lowered because thejigs flux 150 or to attach thesolder balls 130 are used in the same way as before. Furthermore, the method of manufacturing a printed circuit board, according to this embodiment, is advantageous in that the lead time in this method does not differ from the lead time of the conventional method which is performed in a state in which thestrip substrate 100 is not separated into theunit substrates 200 because this method is performed in a state in which the separatedunit substrates 200 are integrally mounted on the fixingmember 110 or thetray 170 for reflow. -
FIGS. 7 , 8, 9, 10, 11A, and 11B are sectional views sequentially showing a method of manufacturing a printed circuit board according to another embodiment of the invention. - The method of manufacturing a printed circuit board, according to this embodiment, includes the steps of (A) mounting a
strip substrate 100 on a fixingmember 110, (B) separating thestrip substrate 100 intounit substrates 200 by a singulation process, (C) attachingsolder balls 130 onto theunit substrates 200 using amask 145 disposed on theunit substrates 200, and (D) fixing thesolder balls 130 on theunit substrates 200 by a reflow process. - This embodiment greatly differs from the above-mentioned embodiment in a process of attaching solder balls. Therefore, the differences therebetween will be mainly described, and a redundant description thereof will be omitted.
- First, as shown in
FIGS. 7 and 8 , astrip substrate 100 is mounted on a fixingmember 110, and is then separated intounit substrates 200. Specifically, thestrip substrate 100 is mounted on the fixing member, such as dicing tape, and then a singulation process is used to separate thestrip substrate 100 into theunit substrates 200 in order to stretch thewarped strip substrate 100. - Subsequently, as shown in
FIG. 9 ,flux 150 is applied on the unit substrates 200. In this embodiment, differently from the above-mentioned embodiment, theflux 150 is applied on theunit substrates 200 using a screen printing process after amask 125 is disposed on the unit substrates 200. More specifically, theflux 150 is applied on theunit substrates 200 by disposing themask 125 provided withopenings 127 on one side of theunit substrates 200 and then pressing theflux 150 onto theunit substrates 200 through theopenings 127 using a squeegee. In order to accurately apply theflux 150 at predetermined positions of theunit substrates 200, it is preferred to suitably control the hardness, fixed angle, velocity and pressure applied to the substrate by thesqueegee 129. In embodiments of the present invention, differently from conventional technologies, a screen printing process based on the premise that a printed circuit board is flat can be performed because the warpage of a printed circuit board was decreased through a singulation process. However, like the above-mentioned embodiment, this procedure may be omitted in the case of a flux-free soldering process. - Subsequently, as shown in
FIG. 10 ,solder balls 130 are attached onto the unit substrates 200. Here, thesolder balls 130, like the procedure of applying theflux 150, are applied on theunit substrates 200 using a screen printing process after amask 145 is disposed on the unit substrates 200. More specifically, thesolder balls 130 are applied on theunit substrates 200 by disposing themask 145 provided withopenings 147 on one side of theunit substrates 200 and then pressing thesolder balls 130 onto theunit substrates 200 through theopenings 147 using a squeegee. According to an embodiment, thesolder balls 130 are attached at predetermined positions of theunit substrates 200 because a singulation process is used to decrease the warpage of a printed circuit board. - Meanwhile, as in the above-mentioned embodiment, the lead time is shortened by performing the step of applying the
flux 150 onto theunit substrates 150 and the step of attaching thesolder balls 130 onto theunit substrates 200 in a state in which theunit substrates 150 separated from thestrip substrate 100 are integrally mounted on the fixingmember 110. Further, at the time of applying theflux 150 and attachingsolder balls 150, asupport plate 160 is employed in order to provide bearing resistance to the unit substrates 200. Thesupport plate 160 fixes theunit substrates 200 by vacuum-adsorbing theunit substrates 200 throughsuction holes 165, so that the residual warpage of theunit substrates 200 are further decreased and the movement of the unit substrates 200 is prevented, with the result that theflux 150 is accurately applied at the predetermined positions of theunit substrates 200 and thesolder balls 130 are accurately attached at the predetermined positions thereof. - Subsequently, as shown
FIGS. 11A and 11B , thesolder balls 130 are fixed on theunit substrates 200 by a reflow process. In this embodiment, the reflow process is performed by mounting the unit substrates 200 on a heat-resistant tray 170 for reflow because theunit substrates 200 are heated to high temperature. - The method of manufacturing a printed circuit board, according to this embodiment, is advantageous in that a singulation process was previously performed to decrease the warpage of a printed circuit board, so that a screen printing process based on the premise that a printed circuit board is flat can be performed, thereby reducing the cost necessary for a high-priced apparatus, such as a flux dotting tool or the like.
- As described above, the method of manufacturing a printed circuit board, according to various embodiments of the invention, is advantageous in that the solder balls are accurately formed at the predetermined positions of the strip substrate because they are attached to the unit substrates after the warpage of the strip substrate was reduced by a singulation process, and in that the additional warpage of the strip substrate occurring in a reflow process can be reduced because the reflow process is performed after the strip substrate is separated into unit substrates by performing the singulation process.
- Further, the method of manufacturing a printed circuit board, according to various embodiments of the invention, is advantageous in that solder balls are attached to unit substrates using a screen printing method because a singulation process reduces the warpage of a strip substrate, and in that the expenditures necessary for a high-priced apparatus, such as a flux dotting tool is reduced because the screen printing method is used.
- Furthermore, the method of manufacturing a printed circuit board, according to various embodiments of the invention, is advantageous in that it can also be used in a wafer leveling process.
- Terms used herein are provided to explain embodiments, not limiting the present invention. Throughout this specification, the singular form includes the plural form unless the context clearly indicates otherwise. When terms “comprises” and/or “comprising” used herein do not preclude existence and addition of another component, step, operation and/or device, in addition to the above-mentioned component, step, operation and/or device.
- Embodiments of the present invention may suitably comprise, consist or consist essentially of the elements disclosed and may be practiced in the absence of an element not disclosed. For example, it can be recognized by those skilled in the art that certain steps can be combined into a single step.
- The terms and words used in the present specification and claims should not be interpreted as being limited to typical meanings or dictionary definitions, but should be interpreted as having meanings and concepts relevant to the technical scope of the present invention based on the rule according to which an inventor can appropriately define the concept of the term to describe the best method he or she knows for carrying out the invention.
- The terms “first,” “second,” “third,” “fourth,” and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Similarly, if a method is described herein as comprising a series of steps, the order of such steps as presented herein is not necessarily the only order in which such steps may be performed, and certain of the stated steps may possibly be omitted and/or certain other steps not described herein may possibly be added to the method.
- The singular forms “a,” “an,” and “the” include plural referents, unless the context clearly dictates otherwise.
- As used herein and in the appended claims, the words “comprise,” “has,” and “include” and all grammatical variations thereof are each intended to have an open, non-limiting meaning that does not exclude additional elements or steps.
- As used herein, the terms “left,” “right,” “front,” “back,” “top,” “bottom,” “over,” “under,” and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein. The term “coupled,” as used herein, is defined as directly or indirectly connected in an electrical or non-electrical manner. Objects described herein as being “adjacent to” each other may be in physical contact with each other, in close proximity to each other, or in the same general region or area as each other, as appropriate for the context in which the phrase is used. Occurrences of the phrase “according to an embodiment” herein do not necessarily all refer to the same embodiment.
- Ranges may be expressed herein as from about one particular value, and/or to about another particular value. When such a range is expressed, it is to be understood that another embodiment is from the one particular value and/or to the other particular value, along with all combinations within said range.
- Although the present invention has been described in detail, it should be understood that various changes, substitutions, and alterations can be made hereupon without departing from the principle and scope of the invention. Accordingly, the scope of the present invention should be determined by the following claims and their appropriate legal equivalents.
Claims (6)
1. A method of manufacturing a printed circuit board, comprising:
mounting a strip substrate on a fixing member;
separating the strip substrate into unit substrates by performing a singulation process;
attaching solder balls onto the unit substrates using a mask disposed on the unit substrates; and
fixing the solder balls on the unit substrates by performing a reflow process.
2. The method of manufacturing a printed circuit board according to claim 1 , wherein, in the mounting of the strip substrate, the fixing member is dicing tape.
3. The method of manufacturing a printed circuit board according to claim 1 , further comprising:
integrally mounting the unit substrates on a support plate before the attaching of the solder balls.
4. The method of manufacturing a printed circuit board according to claim 3 , wherein the support plate fixes the unit substrates by vacuum-adsorbing the unit substrates.
5. The method of manufacturing a printed circuit board according to claim 1 , further comprising:
applying flux onto the unit substrates using a mask disposed on the unit substrates before the attaching of the solder balls.
6. The method of manufacturing a printed circuit board according to claim 1 , further comprising:
mounting the unit substrates on a tray for reflow before the fixing of the solder balls.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/323,728 US20140317919A1 (en) | 2009-11-30 | 2014-07-03 | Method of manufacturing printed circuit board |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR10-2009-0117251 | 2009-11-30 | ||
KR1020090117251A KR101044135B1 (en) | 2009-11-30 | 2009-11-30 | Fabricating Method Of Printed Circuit Board |
US12/730,128 US8800137B2 (en) | 2009-11-30 | 2010-03-23 | Method of manufacturing printed circuit board |
US14/323,728 US20140317919A1 (en) | 2009-11-30 | 2014-07-03 | Method of manufacturing printed circuit board |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/730,128 Division US8800137B2 (en) | 2009-11-30 | 2010-03-23 | Method of manufacturing printed circuit board |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140317919A1 true US20140317919A1 (en) | 2014-10-30 |
Family
ID=44067775
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/730,128 Expired - Fee Related US8800137B2 (en) | 2009-11-30 | 2010-03-23 | Method of manufacturing printed circuit board |
US14/323,728 Abandoned US20140317919A1 (en) | 2009-11-30 | 2014-07-03 | Method of manufacturing printed circuit board |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/730,128 Expired - Fee Related US8800137B2 (en) | 2009-11-30 | 2010-03-23 | Method of manufacturing printed circuit board |
Country Status (3)
Country | Link |
---|---|
US (2) | US8800137B2 (en) |
KR (1) | KR101044135B1 (en) |
CN (1) | CN102083278B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8685833B2 (en) * | 2012-04-02 | 2014-04-01 | International Business Machines Corporation | Stress reduction means for warp control of substrates through clamping |
CN103182608B (en) * | 2013-04-03 | 2015-12-23 | 大族激光科技产业集团股份有限公司 | The processing method that pcb board is uncapped |
KR102359873B1 (en) | 2015-06-16 | 2022-02-08 | 삼성전자주식회사 | Package substrate and semiconductor package including the same |
US10879102B2 (en) * | 2017-08-07 | 2020-12-29 | Boston Process Technologies, Inc | Flux-free solder ball mount arrangement |
CN108638644A (en) * | 2018-05-16 | 2018-10-12 | 郑州云海信息技术有限公司 | A kind of attached seat of vacuum branch |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5875102A (en) * | 1995-12-20 | 1999-02-23 | Intel Corporation | Eclipse via in pad structure |
US7644856B2 (en) * | 2006-11-07 | 2010-01-12 | Shinko Electric Industries Co., Ltd. | Solder ball mounting method and solder ball mounting apparatus |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63140556A (en) | 1986-12-01 | 1988-06-13 | Mitsubishi Electric Corp | Semiconductor device |
US6900534B2 (en) * | 2000-03-16 | 2005-05-31 | Texas Instruments Incorporated | Direct attach chip scale package |
KR20020057516A (en) * | 2001-01-05 | 2002-07-11 | 윤종용 | Method for manufacturing ball grid array package with thermal emissive plate |
US7117581B2 (en) * | 2002-08-02 | 2006-10-10 | Symbol Technologies, Inc. | Method for high volume assembly of radio frequency identification tags |
KR20050056351A (en) | 2003-12-10 | 2005-06-16 | 주식회사 하이닉스반도체 | Method for fabricating bga package |
KR20050108213A (en) * | 2004-05-12 | 2005-11-16 | 주식회사 하이닉스반도체 | Substrate of mounting a semiconductor device for packaging |
US7257887B2 (en) * | 2004-06-14 | 2007-08-21 | David Lee | Die holding apparatus for bonding systems |
KR100728989B1 (en) | 2006-06-30 | 2007-06-15 | 주식회사 하이닉스반도체 | Substrate for fbga package fabrication |
KR20090078417A (en) * | 2008-01-15 | 2009-07-20 | (주) 디시티 | Reballing method of ball grid array |
-
2009
- 2009-11-30 KR KR1020090117251A patent/KR101044135B1/en active IP Right Grant
-
2010
- 2010-03-23 US US12/730,128 patent/US8800137B2/en not_active Expired - Fee Related
- 2010-04-12 CN CN2010101464664A patent/CN102083278B/en not_active Expired - Fee Related
-
2014
- 2014-07-03 US US14/323,728 patent/US20140317919A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5875102A (en) * | 1995-12-20 | 1999-02-23 | Intel Corporation | Eclipse via in pad structure |
US7644856B2 (en) * | 2006-11-07 | 2010-01-12 | Shinko Electric Industries Co., Ltd. | Solder ball mounting method and solder ball mounting apparatus |
Also Published As
Publication number | Publication date |
---|---|
KR20110060622A (en) | 2011-06-08 |
CN102083278B (en) | 2013-09-11 |
KR101044135B1 (en) | 2011-06-28 |
CN102083278A (en) | 2011-06-01 |
US8800137B2 (en) | 2014-08-12 |
US20110126409A1 (en) | 2011-06-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20140317919A1 (en) | Method of manufacturing printed circuit board | |
KR101174056B1 (en) | Semiconductor device and its fabrication method | |
US7919851B2 (en) | Laminate substrate and semiconductor package utilizing the substrate | |
US20130008024A1 (en) | Electronic Component-Embedded Printed Circuit Board and Method Of Manufacturing The Same | |
US20060008579A1 (en) | Capacitor element, manufacturing method therefor, semiconductor device substrate, and semiconductor device | |
US7827681B2 (en) | Method of manufacturing electronic component integrated substrate | |
JP4978054B2 (en) | Semiconductor device, manufacturing method thereof, and circuit board device | |
JPWO2018008066A1 (en) | Transfer method and mounting method | |
JP2011187913A (en) | Electronic element incorporation type printed circuit board, and method of manufacturing the same | |
JP2010010356A (en) | Method and device for manufacturing semiconductor device, and pin | |
KR101043328B1 (en) | Electro device embedded printed circuit board and manufacturing method thereof | |
CN101488487B (en) | Board adapted to mount an element, semiconductor module and manufacturing method therefore, and portable device | |
JP3084021B1 (en) | Electronic component manufacturing method | |
JP2004327944A (en) | Mounting method of wiring board | |
JP2011054653A (en) | Manufacturing method of semiconductor device | |
JP2006332385A (en) | Method and device for mounting semiconductor device | |
JP4333218B2 (en) | Multi-layer circuit board with stiffener | |
JP2004039802A (en) | Method of manufacturing semiconductor device, and semiconductor manufacturing apparatus | |
KR100855822B1 (en) | Apparatus and Method of Printing the Pattern on the Substrate | |
JP4103482B2 (en) | Semiconductor mounting substrate, semiconductor package using the same, and manufacturing method thereof | |
US20210313194A1 (en) | Method for manufacturing semiconductor device and manufacturing apparatus | |
JP4605177B2 (en) | Semiconductor mounting substrate | |
JP2003347366A (en) | Tape carrier for semiconductor device, semiconductor device and method for manufacturing the semiconductor device | |
JP2007012780A (en) | Circuit board structure and method of manufacturing same | |
JP2003243434A (en) | Semiconductor device and manufacturing method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SAMSUNG ELECTRO-MECHANICS CO., LTD., KOREA, REPUBL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KIM, JIN SU;CHOI, SEOG MOON;REEL/FRAME:033241/0783 Effective date: 20100220 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |