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For the same reason, this is generally restricted to the production of read-only CDs and DVDs (CD-ROM or DVD-ROM). Recordable CDs and DVDs (CD-R or DVD-R or DVD+R) are not generally available except in standard shapes including rectangular. The second method to produce a shaped CD or DVD is to produce a normal CD-ROM or DVD-ROM and cut it to the desired shape. This method works only for CD-ROM. It will not work for CD-R because the plastic used to produce CD-R tends to splinter when cut. It is important that two criteria be met for a shaped disc to function properly. First, the shape must be balanced to avoid problems when it begins to spin. Second, at least three points of the outer edge must touch either the outer 12 cm diameter rim of the player's tray where standard size discs fit or the inner rim where 8 cm diameter mini discs fit.
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produced examples of non-round discs that predate the patent. The matter continued to be in litigation as of
November 2009. Observation of the aforementioned patent has determined that it is only in regards to magnetic media and further citations may be needed to verify its application to CD optical media. The patent expired on 18 October 2015.
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Data can only be recorded on sections of a Shaped CD that form uninterrupted circular tracks. Other parts of the shape are purely decorative - but are still often finished to the same appearance as a CD. They appear silver and reflective on the data side of the CD, even though they contain no actual
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Shaped CDs are produced in one of two ways. A special mold can be made and used to "stamp" CDs (or DVDs) as part of the precision injection molding process that is used to make CDs and DVDs. Because of the initial cost involved in setting up this process, it is usually used for mass production.
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Picture of the back of a shaped CD. This CD was produced as a round disc and automatically cut to shape using a computer-aided machine with a rotary tool. It is easy to distinguish that the data track of the disc is smaller compared to a full 72-minute disc; it ends before it reaches the outside
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Shaped CDs are not compatible with all CD players. They work with most machines where the disc is inserted by manually clipping it onto a spindle (the mechanism in virtually all portable CD players), but may not work in drives that load the disc from a tray, and they are not compatible with any
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A patent exists on the production of all non-round CDs. Often referred to as the "Rose Patent," its holder David H. Rose litigated to collect royalties on the production or sale of any non-round disc. Other manufacturers of non-round discs litigated to dispute the validity of this patent and
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than stand-alone audio CD players. Some irregularly shaped discs work with tray-loading CD drives if they include a circular ridge on their underside that centers them on the part of the tray designed to hold 80 mm CDs, if the tray has such a feature.
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and more. These discs are usually made for marketing purposes and are properly read by most CD-ROM drives (and audio CD players, although custom-shaped CDs tend to contain less data). There are many companies that sell CDs with custom shapes.
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Business card CDs or shaped CDs can hold any type of data and can usually store anywhere from 40MB to 100MB of information. These CDs may be used for promotional pieces for business, music or many other uses.
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slot-loading drives. They can even get stuck in these players, or be rejected if the tray-loading mechanism has optical sensors to detect the disc position.
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may also cause damaging vibration if played in computer CD drives, which can operate at a much higher
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games also received shaped CDs. The CD soundtrack to the 1997 game
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236:. The disc is shaped like a skull. British death metal band
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Unusual types of gramophone records#Unusually shaped discs
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The first square CD featured four arrangements of the
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also released a limited edition of their 1996 album
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49:. Unsourced material may be challenged and removed.
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184:" on a disc in the shape of an 8-pointed
109:Learn how and when to remove this message
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219:An additional example is the 2002 live
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47:adding citations to reliable sources
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16:Special variety of compact discs
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253:One shape of business-card CD.
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246:as a CD shaped like a brain.
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275:Irregularly shaped, non-
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339:— Star-shaped CD label
307:Bootable business card
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279:discs with an offset
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230:symphonic black metal
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58:"Shaped compact disc"
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285:rotational velocity
138:. Examples include
132:shaped compact disc
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335:2007-09-26 at the
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198:, an album called
144:interview material
134:is a non-circular
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99:November 2009
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60: –
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54:Find sources:
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32:This article
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977:Compact disc
841:Scarlet Book
588:CD emulation
573:CD authoring
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396:Compact disc
353:. Retrieved
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292:Legal/patent
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41:Please help
36:verification
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837:Hybrid SACD
816:Purple Book
736:Court cases
710:CD recorder
608:CD bronzing
439:Yellow Book
429:Orange Book
190:Nintendo 64
956:Wiktionary
857:Picture CD
655:Rock Ridge
625:CD-i Ready
615:CD subcode
598:CD ripping
578:CD burning
561:Technology
550:White Book
517:Beige Book
465:Green Book
355:2024-03-14
318:References
214:Diddy Kong
173:Doctor Who
69:newspapers
898:LaserDisc
867:VinylDisc
720:CD single
715:CD ripper
698:CD player
660:ISO 13490
635:El Torito
630:4ch CD-DA
528:shaped CD
494:(Karaoke)
481:Blue Book
216:'s head.
971:Category
936:Category
903:MiniDisc
876:See also
862:VideoNow
822:DualDisc
795:CD Video
790:ATRAC CD
693:CD drive
640:ISO 9660
620:C2 error
513:Photo CD
419:Red Book
333:Archived
301:See also
243:Swansong
152:Mini CDs
946:Commons
883:Blu-ray
847:MovieCD
688:CD Case
503:Mini CD
498:Gold CD
472:CD-Text
238:Carcass
166:History
150:Unlike
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893:HD DVD
852:MP3 CD
645:Joliet
603:CD rot
450:CD-MRW
435:CD-ROM
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752:Lists
650:Romeo
487:CD+EG
455:CD-MO
445:CD-RW
415:CD-DA
403:Discs
232:band
204:Yoshi
90:JSTOR
76:books
918:WORM
908:SACD
827:HDCD
807:cDVD
672:XRCD
540:SVCD
523:PMCD
492:CD+G
460:CD-i
425:CD-R
186:star
62:news
913:UMD
888:DVD
667:UDF
545:VCD
477:CD+
45:by
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410:CD
221:EP
130:A
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87:·
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
