1. An electric washing machine comprising:
a housing;
a cover member defining a front wall of the housing and having an access opening through which laundry is loaded and unloaded into and out of the housing;
a laundry containing tub disposed in the housing and having a tub opening provided in association with the access opening so that the laundry is loaded therein through the access opening and the tub opening to be contained therein;
a door which opens and closes the access opening and the tub opening; and
a packing which covers a peripheral edge of the tub opening and is brought into intimate contact with the door for sealing a gap defined between the door and the peripheral edge of the tub opening when the door is closed, the packing being opposed to the access opening with a space defined between a lower edge portion of the access opening and the packing wherein the packing has a shutter portion which cover the space when the door is opened, and uncovers the space when the door is closed.
2. The electric washing machine according to claim 1, wherein the cover member has a plurality of ribs provided adjacent the lower edge portion of the access opening thereof as extending downward and arranged at intervals along the space defined between the packing and the lower edge portion of the access opening.
3. The electric washing machine according to claim 2, wherein the door has a guide wall extending toward the space.
4. The electric washing machine according to claim 3, further comprising an inclined wall disposed below the space and inclined forwardly downward to be connected to the cover member.
5. The electric washing machine according to claim 2, further comprising an inclined wall disposed below the space and inclined forwardly downward to be connected to the cover member.
6. The electric washing machine according to claim 1, wherein the door has a guide wall extending toward the space.
7. The electric washing machine according to claim 6, further comprising an inclined wall disposed below the space and inclined forwardly downward to be connected to the cover member.
8. The electric washing machine according to claim 1, further comprising an inclined wall disposed below the space and inclined forwardly downward to be connected to the cover member.
9. An electric washing machine comprising:
a housing;
a cover member defining a front wall of the housing and having an access opening through which laundry is loaded and unloaded into and out of the housing;
a laundry containing tub disposed in the housing and having a tub opening provided in association with the access opening so that the laundry is loaded therein through the access opening and the tub opening to be contained therein; wherein a packing has a shutter portion which cover the space when the door is opened, and uncovers the space when the door is closed;
a door which opens and closes the access opening and the tub opening;
wherein the cover member has a first engagement portion provided adjacent a lower edge portion of the access opening;
wherein the door has a second engagement portion to be engaged with the first engagement portion when the door is closed.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of forming a plurality of bumps on a wafer having an active surface, wherein the wafer further includes a plurality of bonding pads formed on the active surface and a passivation layer formed on the active surface that exposes the bonding pads, the method comprising the steps of:
forming an under bump metallurgy layer over the active surface of the wafer, wherein the under bump metallurgy layer covers both the bonding pads and the passivation layer;
patterning the under bump metallurgy layer so that a residual portion of the under bump metallurgy layer remains over each of the bonding pads;
forming a polymer layer over the active surface of the wafer, wherein the polymer layer has a plurality of openings that expose the residual portion of the under bump metallurgy layer;
disposing a plurality of solder balls into each of the openings, wherein each of the solder balls has a flux material formed on a surface of each of the solder balls;
performing a reflow process so that the solder balls are bonded to the residual portion of the under bump metallurgy layer; and
removing the polymer layer.
2. The method of claim 1, wherein the under bump metallurgy layer comprises an adhesive layer and a metallic layer formed on the adhesive layer.
3. The method of claim 2, wherein a material constituting the adhesive layer is selected from a group consisting of titanium, titanium-tungsten alloy, chromium, chromium-copper alloy, copper and tantalum.
4. The method of claim 2, wherein a material constituting the metallic layer is selected from a group consisting of nickel-vanadium alloy, titanium nitride, tantalum nitride, nickel, chromium-copper alloy, chromium, copper and palladium.
5. The method of claim 2, wherein a material constituting the solder balls includes a lead-tin alloy.
6. The method of claim 2, wherein a material constituting the solder balls includes a lead-free alloy.
7. The method of claim 2, wherein a material constituting the solder balls is selected from a group consisting of lead, gold, silver, copper, magnesium, bismuth, antimony, indium and zinc.
8. The method of claim 1, wherein a material constituting the bonding pads is selected from a group consisting of copper and aluminum.
9. The method of claim 1, wherein the polymer layer is a photoresist layer.
10. The method of claim 1, wherein the polymer layer is a dry film.
11. The method of claim 1, wherein the polymer layer is formed by spin-coating.
12. The method of claim 1, wherein the flux material is solid-like.
13. The method of claim 1, wherein the flux material is in a solid state.