Logistic circuit the pressing demand to high speed component, make semiconductor production industry ceaseless with small shrink, the property performance with increase the means of density and clock speed to obtain better, but be in rub the instantly that Er law encounters predicament, the space that this kind of course of action leaves semiconductor the technology appears already not much
Because chip is tiny,this is shrink, raise density and clock rate, can cause a crucial problem, that is power comsumption, add advanced technology under, the leakage current that the contractible meeting of brake pole brings about chip interior more and more restrain hard, leakage current is to be able to generate a the biggest question, that is calorific.
Also accordingly, at present whole industry is found out in what deliberately plan can replace at present the material of new generation semiconductor of mainstream silicon material, but this is not so simple thing, come you should consider the compatibility with existing craft, 2 will want to be able to realize the amount that can charge cost to fall to produce on the technology, finally, material itself cannot be obtained too hard again.
Also the limitation because of these 3 kinds of reasons, at present silicon still is replaced hard, after all silicon is the obtains the most easily data on the earth, abstract easily, and have again can cooperate modulation to change its electric and characteristic feature with other data, make its application very wide, silicon can be used calculate, can use irradiation, also can use " look " , will look at present, still do not have a kind of material to be able to replace the position of silicon really.
As to germanium material, its really current semiconductor industry is the material of a very general application, the earliest transistor on the world uses germanium material to make namely.
Besides be in in semiconductor domain, its are measured in aerospace accuse, nuclear physics is explored, the domain such as medicine of fiber-optic communication, infra-red optics, solar battery, chemical activator, biology has extensive and fundamental application.
Although theoretic germanium has a lot of outstanding character, e.g. electronic mobility double be silicon, electric hole mobility more the astral material that surmounts the tomorrow that is known as the most organic meeting to replace silicon, change gallium like arsenic namely (GaAs) , nitrogen changes gallium (GaN) , phosphor changes indium (InP) , antimony changes indium (InSb) common 35 a group of things with common features semiconductor material, and because mix the crystal lattice difference between silicon (Lattice Mismatch) is opposite smaller, can be in to show some silicon technology by conformity, because of this and 35 a group of things with common features the star of the tomorrow that is regarded as prospective semiconductor material likewise.
But should use pure germanium to do CPU? This can understand very much said, should be being done really is not impossible, but be being done basically is expensive slow product, use completely falsely. Although germanium has its advantage on electric character, but defect as much not small, for example because be obtained hard, cost is extremely so high, the physical character with simple material is very soft this bit more fragile likewise far be inferior to silicon, make its machine special difficulty, and as " semiconductor " , the oxide of the oxide of germanium and silicon also has on insulation stability very big different.
If want be apt to to use the character of germanium, must in order to join miscellaneous technology, the advantage that combines other data will offset its weakness, grow for example on the substrate that is based on silicon the film of germanium, combine the advantage of both, can considerably aggrandizement is current the computational ability of semiconductor framework.
With the development of semiconductor course looks, germanium is data of the earliest generation semiconductor, at present although active in a lot of domains, but basically had had paragraph of space from computational application, if use production computation core, actually still a lot of difficulty need a breakthrough.
Because of the advantage that its get on in electric character, organic meeting mixes germanium newest 35 a group of things with common features the glow on the way that material develops in semiconductor technology jointly is calorific, space of its application development is very vast still, with onefold applying face all along comments on this material actually not fair.
