[permalink] [id link]
If the ions have high enough energy, they can knock atoms out of the material to be etched without a chemical reaction.
from
Wikipedia
Some Related Sentences
If and ions
If SR calcium stores become too high, some ions are released spontaneously through SR ryanodine receptors.
If this process happens faster than it is naturally quenched by ions recombining, the new ions multiply in successive cycles until the gas breaks down into a plasma and current flows freely in a discharge.
If some of the magnetic ions subtract from the net magnetization ( if they are partially anti-aligned ), then the material is " ferrimagnetic ".
If the moments of the aligned and anti-aligned ions balance completely so as to have zero net magnetization, despite the magnetic ordering, then it is an antiferromagnet.
If one assumed that magnetopause was just a boundary between a magnetic field in a vacuum and a plasma with a weak magnetic field embedded in it, then the magnetopause would be defined by electrons and ions penetrating one gyroradius into the magnetic field domain.
If the solvent is water, hydration occurs when the charged solute ions become surrounded by water molecules.
If the gram of ions is then accelerated to 500, 000 m / s then d / dt ( mv < sub > 2 </ sub >) is ( 0. 001 kg / s ) ( 500, 000 m / s ) = 500 N.
If the ions are not mobile, as in a solid salt then electrolysis cannot occur.
If a high proportion of the solute dissociates to form free ions, the electrolyte is strong ; if most of the solute does not dissociate, the electrolyte is weak.
If nitrate is absorbed, it is first reduced to nitrite ions and then ammonium ions for incorporation into amino acids, nucleic acids, and chlorophyll.
If the voltage is large enough, essentially all electrons ( and any negative ions ) will be repelled.
If a mole of ions goes into solution ( for example, in a Daniell cell, as discussed below ) the charge through the external circuit is:
If the pH is low, the equilibrium shifts to the right: more ammonia molecules are converted into ammonium ions.
If the pH is high ( the concentration of hydrogen ions is low ), the equilibrium shifts to the left: the hydroxide ion abstracts a proton from the ammonium ion, generating ammonia.
If a poor diatomic gas quencher were introduced to the tube, the positive argon ions, during their motion toward the cathode, would have multiple collisions with the quencher gas molecules and transfer their charge and some energy to them.
If the temperature stays constant at its new value, the pyroelectric voltage gradually disappears due to leakage current ( the leakage can be due to electrons moving through the crystal, ions moving through the air, current leaking through a voltmeter attached across the crystal, etc.
If there is even a little permeability to water, ions can move through the rock and decrease the voltage difference with the mud nearby.
If the electric field is removed, the electrons move to the right, repelled by each other and attracted to the positive ions left bare on the right side.
If the composition of the same system is instead expressed in terms of ions, the number of independent components does not change.
If heavier particles are to be accelerated, ( e. g. uranium ions ), a specialized ion source is needed.
If the ionisation had been due to γ-rays originating at the surface of the Earth, the intensity of ions should have halved in 80m.
If any smoke particles pass into the chamber the ions will attach to the particles and so will be less able to carry the current.
If and have
If he had married her, he'd have been asking for trouble.
`` If you hadn't I'd have killed you ''.
If we have to we'll take him apart and see what he's made of ''!!
If it were not for an old professor who made me read the classics I would have been stymied on what to do, and now I understand why they are classics ; ;
If it were not that I knew who it was I could have mistaken it for my Aunt so well did her clothes fit him.
`` If you can conveniently let me have twenty dollars '', he wrote one friend in 1791 when he was Secretary of the Treasury.
If these people were denied a voice ( do they have a moral right to a voice??
If we want respect from ourselves or others, we will have to earn it.
If he had been `` liquidated '' in some way, he would have become a martyr, a rallying point for people who shared his ideas.
If our sincerity is granted, and it is granted, the discrepancy can only be explained by the fact that we have come to believe hearsay and legend about ourselves in preference to an understanding gained by earnest self-examination.
If you cut down these horrible buildings you'll have no more traffic jams.
If I am to speak the whole truth about my knowledge of love, I will have to stop trying to emulate the transcendant nightingale.
If you had screamed right there in the street where we stood, I could not have felt more fear.
If we grasp this opportunity to build an age of productive partnership between the less fortunate nations and those that have already achieved a high state of economic advancement, we will make brighter the outlook for a world order based upon security and freedom.
If his scholarship and formal musicianship were not all they might have been, Mercer demonstrated at an early age that he was gifted with a remarkable ear for rhythm and dialect.
If only for this modest masterpiece of military history, Blenheim is likely to be read and reread long after newer interpretations have perhaps altered our picture of the Marlborough wars.
If Gorton wanted peace and quiet for his complicated meditations this is where he should have had it.
If Krutch is correct, tragedy may have quite the opposite effect.
`` If you can firmly make the good knight sure to pleasure our Corporation '', Sturley wrote, `` besides that ordinary allowance for your diet you shall have 20 for recompence ''.
If he borrowed money from Shakespeare or with his help, he would now have been able to repay the loan.
If any one of them has any power to veto the Secretary General's decisions the nature of the organization will have changed.
If he can bounce back with one of those 25 home runs years, the club will have to be better off offensively.
If there were no West Berlin problem, imperialist quarters would have invented an excuse for stepping up the armaments race to try to solve the internal and external problems besetting the United States and its NATO partners.
If he can't play with Mommy's magazines, he should have some old numbers of his own.
If they also defeat the school bill, the GOP task force won't have much research to do.
0.134 seconds.